Oscar Fish Care: Tank Setup, Feeding, and Health Management

Oscar fish (Astronotus ocellatus) are large cichlids native to South America that require substantial aquarium systems, protein-rich diets, and consistent water quality management to thrive in captivity. This article provides practical guidance for farmers, aquaculture workers, veterinary professionals, students, and facility planners who keep oscars for ornamental production, research, or display. The content focuses on measurable management decisions, record keeping, and escalation criteria for health problems, with emphasis on preventing the environmental stress that predisposes oscars to parasitic and bacterial disease.

Species Profile and Production Context

Oscar fish are among the most popular ornamental cichlids in global aquaculture, valued for their intelligence, color variation, and interactive behavior. They are hardy in some respects but demanding in others, particularly regarding water quality and tank volume. Adult oscars commonly reach 30 to 35 centimeters in total length and can live 10 to 15 years under proper care. Their large size, high waste output, and territorial behavior make them unsuitable for small aquariums or community tanks with small fish.

The ornamental fish sector carries economic significance, yet antibiotic use in this industry remains underrecognized as a contributor to antimicrobial resistance. A 2025 review in Microorganisms highlights that tetracyclines and fluoroquinolones are widely used in ornamental fish production, transportation, and retail, primarily targeting bacterial diseases such as aeromonosis and vibriosis. Pathogens including Edwardsiella, Flavobacterium, and Shewanella species cause hemorrhagic septicemia, fin rot, skin ulcers, and exophthalmia, impairing fish health and marketability. Prophylactic and therapeutic antibiotic applications elevate residues in fish tissues and carriage water, selecting for resistant bacteria and resistance genes that pose risks to fish, handlers, and the environment. The review calls for a One Health approach involving surveillance, regulatory oversight, and alternatives such as probiotics and advanced water treatment. For oscar keepers, this means prioritizing prevention through water quality management instead of relying on medication.

At a Glance

Tank Setup and Environmental Requirements

Minimum Tank Size and Stocking Density

Oscar fish require generous swimming space because they grow rapidly and produce substantial biological waste. A single adult oscar needs a minimum of 450 liters, while a bonded pair requires 750 liters or more. Tanks smaller than these volumes lead to stunted growth, suppressed immunity, and aggressive behavior. For production facilities, stocking density must account for filtration capacity and water exchange rates, beyond tank dimensions.

The relationship between tank size and fish health is direct. Overcrowding increases ammonia production beyond what biological filtration can process, creating chronic low-level toxicity that suppresses appetite and immunity. When selecting tanks for oscar production, calculate the expected adult biomass and match filtration and water exchange capacity accordingly. A practical rule is to provide at least 40 liters of water per adult oscar, with proportionally more space for breeding pairs.

Substrate, Decor, and Hiding Places

Oscars are substrate-oriented fish that dig and rearrange their environment. Use smooth gravel or sand that will not injure their mouths during digging. Avoid sharp-edged substrates such as crushed coral or jagged rock. Provide large pieces of driftwood, smooth rocks, or clay pots as structure, but anchor them securely because oscars will attempt to move them.

Hiding places reduce stress and aggression, particularly when keeping multiple oscars or introducing new fish. PVC pipes and ceramic caves work well and are easy to clean. Leave open swimming areas in the middle of the tank because oscars are active swimmers that need unobstructed space. Plants are difficult to maintain with oscars because they uproot vegetation, so use artificial plants or tough species anchored heavily if plant cover is desired.

Filtration and Water Circulation

Biological filtration is the backbone of oscar tank management. Oscars produce high ammonia loads from their protein-rich diet and large body mass. A canister filter or sump system rated at 4 to 6 times the tank volume per hour provides adequate mechanical and biological filtration for most setups. For heavily stocked production tanks, increase circulation and consider additional biological media.

The nitrogen cycle must be fully established before adding oscars. This process typically takes 4 to 8 weeks and requires a source of ammonia to grow nitrifying bacteria. Test ammonia, nitrite, and nitrate regularly during the cycling period. Do not add oscars until ammonia and nitrite readings are consistently zero. Moving established filter media from a healthy tank can accelerate cycling, but monitor water parameters closely for the first two weeks after introduction.

Water Parameters and Quality Management

Oscar fish tolerate a range of water conditions but perform best within specific parameters. Maintain water temperature between 24 and 28 degrees Celsius, pH between 6.5 and 7.5, and hardness between 5 and 20 dGH. Stability matters more than exact values, so avoid rapid fluctuations in any parameter.

Ammonia and nitrite must remain at zero at all times. Nitrate should stay below 40 mg/L, with weekly water changes of 25 to 30 percent for stocked tanks. Un-ionized ammonia is particularly dangerous. A documented case involving oscar fish found that elevated un-ionized ammonia was the only abnormal water quality parameter in a facility experiencing disease outbreaks. This finding underscores that water quality monitoring must include ammonia fractions, beyond total ammonia nitrogen.

Use a test kit that measures total ammonia and calculate un-ionized ammonia based on pH and temperature. At pH above 7.5 and temperatures above 25 degrees Celsius, a larger fraction of total ammonia exists as toxic un-ionized ammonia. When in doubt, increase water change frequency and reduce feeding until ammonia readings stabilize.

Feeding and Nutrition

Dietary Requirements for Growth and Health

Oscar fish are omnivorous with a strong preference for protein-rich foods. In the wild, they consume insects, crustaceans, small fish, and plant matter. In captivity, a varied diet of high-quality pellets, frozen foods, and occasional live foods supports growth, coloration, and immune function.

Commercial cichlid pellets with 35 to 45 percent protein serve as the dietary staple. Supplement with frozen or fresh foods such as bloodworms, brine shrimp, krill, and chopped fish or shrimp. Earthworms are an excellent treat that oscars accept readily. Avoid mammalian meats such as beef heart or pork because oscars digest them poorly, and these foods can cause fatty liver disease over time.

Feeding Frequency and Portion Control

Juvenile oscars should be fed 2 to 3 small meals daily, while adults do well on 1 to 2 meals per day. Feed only what the fish consume within 2 to 3 minutes per meal. Overfeeding is a common management error that degrades water quality and leads to obesity.

Monitor body condition regularly. A healthy oscar has a full belly but no bulging fat deposits behind the head or around the vent. Adjust portions based on appetite, growth rate, and water quality readings. If ammonia or nitrite rises after feeding, reduce portion sizes or increase water change frequency.

Nutritional Considerations and Fatty Acid Needs

Fish require long-chain polyunsaturated fatty acids for normal growth and health. Research on fatty acyl desaturases in teleost fish shows that marine species possess delta-6 desaturases with high delta-8 activity, while freshwater species such as zebrafish have different desaturation profiles. These differences affect how fish synthesize essential fatty acids from dietary precursors. For oscars, a freshwater species, providing preformed long-chain fatty acids through fish-based ingredients in the diet is more reliable than relying on endogenous synthesis.

High-quality commercial diets formulated for carnivorous cichlids include fish meal and fish oil, which supply these essential fatty acids. Supplementing with frozen fish or shrimp provides additional long-chain fatty acids. Avoid feeding only plant-based foods, which lack the fatty acid profile oscars need for optimal health.

Health Management and Disease Prevention

Common Health Problems in Oscar Fish

Oscar fish are susceptible to several diseases, many of which stem from environmental stress. The most common problems include ich (white spot disease), fin rot, hole-in-the-head disease, and bacterial infections such as aeromonosis. Parasitic infestations, including gill flukes and skin flukes, also occur, particularly in newly acquired fish.

A documented case involving 30 oscar fish illustrates how mild parasitic infestation can escalate under environmental stress. The fish presented with a mild Argulus sp. infestation, which was managed with diflubenzuron at 0.01 mg/L of water. Following the second treatment, six fish developed panexophthalmia (protruding eyes), with three mortalities, two showing ascites (fluid accumulation in the abdomen). Microbiological analysis of ascitic fluid identified Aeromonas hydrophila and Enterococcus faecalis. The A. hydrophila was sensitive to tetracycline and enrofloxacin, while E. faecalis was sensitive to tetracycline but intermediate to enrofloxacin. Hematology revealed microcytic normochromic anemia, leukocytosis dominated by neutrophils or heterophils and monocytes, and lymphopenia. Histopathology showed severe secondary lamellar fusion in gills, granulomatous inflammation in multiple organs, hepatic degeneration, and mild co-infection with Monogenean and Trichodina species. Elevated un-ionized ammonia was the only abnormal water quality parameter. Surviving symptomatic fish received intramuscular enrofloxacin at 10 mg/kg body weight for 7 days and topical water bandage application, resulting in full recovery in two cases and clinical improvement in the third.

This case demonstrates that even mild parasitic infestations can facilitate opportunistic bacterial infections under environmental stress, leading to systemic pathology. Integrated management combining parasite control, targeted antibiotic therapy, water quality improvement, and topical care yielded favorable outcomes.

Parasite Control and Biosecurity

Parasite control begins with quarantine. All new fish should spend 4 to 6 weeks in a separate quarantine system before entering the main production area. During quarantine, observe fish daily for signs of parasites, including flashing (rubbing against objects), rapid gill movement, and visible spots or worms on the skin or gills.

Freshwater fish can carry parasites such as Argulus (fish lice), Monogenean flukes, and Trichodina. These parasites multiply rapidly under stress and can cause severe damage when present in large numbers. Treatment options exist, but prevention through quarantine and water quality management is more effective and safer than treating established infestations.

The World Organisation for Animal Health provides standards for aquatic animal health and welfare that apply to ornamental fish production. These standards emphasize surveillance, early detection, and biosecurity measures to prevent disease introduction and spread. For oscar facilities, biosecurity includes controlling visitor access, disinfecting equipment between tanks, and using dedicated nets and siphons for each system.

Bacterial Infections and Antibiotic Stewardship

Bacterial infections in oscars typically follow stress events such as poor water quality, temperature shock, or parasitic damage. Common bacterial pathogens include Aeromonas, Enterococcus, Edwardsiella, Flavobacterium, and Shewanella species. These pathogens cause hemorrhagic septicemia, fin rot, skin ulcers, and exophthalmia.

Antibiotic use in ornamental fish requires careful consideration. The review in Microorganisms emphasizes that widespread and often unregulated antibiotic use in ornamental fish production selects for resistant bacteria and resistance genes. These resistant elements pose risks to fish health, human exposure through direct contact and bioaerosols, and environmental health through contamination pathways. The review calls for enhanced surveillance, stringent regulatory oversight, and adoption of alternative antimicrobial strategies such as probiotics and advanced water treatments.

For oscar keepers, antibiotic stewardship means using antibiotics only when a bacterial infection is confirmed or strongly suspected, following veterinary guidance, and completing the full treatment course. Never use antibiotics prophylactically in healthy fish. When antibiotics are necessary, isolate affected fish in a hospital tank to reduce the volume of medicated water and limit selection pressure on the main system.

The U.S. Food and Drug Administration regulates animal drugs, including those used in ornamental fish. Fish keepers should be aware that some antibiotics are not approved for use in food fish, and using them in fish that may enter the food chain is illegal. Even though oscars are ornamental fish, responsible antibiotic use protects both fish health and public health.

Water Quality as the Foundation of Health

Water quality is the single most important factor in oscar health. Poor water quality suppresses the immune system, making fish vulnerable to parasites and bacteria that healthy fish would resist. The oscar case report identified elevated un-ionized ammonia as the only abnormal water quality parameter in a facility experiencing a disease outbreak, highlighting how a single water quality failure can trigger cascading health problems.

Monitor water quality on a schedule appropriate to stocking density and feeding rates. For established tanks, test ammonia and nitrite weekly, nitrate biweekly, and pH and temperature daily. Keep records of all test results and water changes. Trends matter more than individual readings, so track parameters over time to identify developing problems before they become acute.

Behavioral Management and Environmental Enrichment

Understanding Oscar Behavior

Oscars are intelligent, social fish with distinct personalities. They recognize their keepers, learn feeding routines, and interact with their environment. They are also territorial and can be aggressive, particularly during breeding or when housed in cramped conditions. Understanding these behaviors helps keepers provide appropriate enrichment and manage aggression.

Healthy oscars are active swimmers that explore their environment and respond to activity outside the tank. They dig in the substrate, rearrange decor, and may surface for food. Lethargy, hiding, or refusal to eat indicates stress or illness. Changes in behavior often precede visible signs of disease, so daily observation is a valuable diagnostic tool.

Environmental Enrichment and Stress Reduction

Environmental enrichment reduces stress and promotes natural behaviors. Provide structure such as caves, driftwood, and rocks that create territories and hiding places. Vary feeding routines by offering food in different locations or using feeding rings to encourage foraging behavior. Some keepers train oscars to take food from their fingers, which provides mental stimulation and strengthens the keeper-fish bond.

Water temperature significantly influences fish behavior and physiology. Research on Nile tilapia raised at 32 degrees Celsius showed that heat stress reduced feeding frequency and mid-water swimming behavior while increasing surfacing and opercular movement. Heat-stressed fish also showed elevated cortisol, glucose, and cholesterol levels, along with reduced red blood cell counts, white blood cell counts, hemoglobin, and hematocrit. Brain tissue showed vascular congestion, perivascular edema, neuronal pyknosis, and neuropil microcavitation. These findings demonstrate that temperature stress affects behavior, physiology, and brain structure. For oscars, maintaining stable temperatures within their preferred range prevents similar stress responses.

Aggression and Social Structure

Oscars are territorial and may fight when housed together, especially in tanks that are too small. Keeping a single oscar avoids aggression issues, while keeping a bonded pair requires a large tank with multiple territories. Introducing new oscars to an established tank often results in aggression, so quarantine and careful introduction are essential.

When aggression occurs, provide visual barriers and multiple hiding places to allow subordinate fish to escape. Rearranging decor before introducing new fish disrupts established territories and reduces aggression. If aggression persists despite these measures, separate the fish into different tanks.

Records and Measurements

Essential Records for Oscar Facilities

Maintaining accurate records is essential for managing oscar health and production. Records should include water quality test results, feeding amounts and frequencies, fish growth measurements, health observations, treatments administered, and mortality events. These records allow keepers to identify trends, evaluate management decisions, and provide information to veterinarians when health problems arise.

Growth Monitoring and Body Condition Scoring

Regular growth monitoring identifies nutritional problems and health issues before they become severe. Measure total length and weight monthly for juvenile oscars and quarterly for adults. Track growth rates against expected values for the species and adjust feeding accordingly.

Body condition scoring provides a quick assessment of nutritional status. A healthy oscar has a rounded belly without prominent spine or ribs. A concave belly indicates underfeeding or internal parasites, while a bulging belly with a thin tail indicates overfeeding or organ enlargement. Score body condition on a 1 to 5 scale and record it with growth measurements.

Water Quality Testing Protocols

Water quality testing requires consistent technique and reliable equipment. Use test kits that are not expired and follow manufacturer instructions exactly. Calibrate electronic meters regularly and replace reagents according to the manufacturer schedule. Record all results immediately in the water quality log.

Test ammonia and nitrite weekly in established tanks and daily during cycling or after adding new fish. Test nitrate biweekly and after any water quality event. Test pH and temperature daily, and test alkalinity and hardness monthly. When any parameter falls outside the acceptable range, test more frequently until the problem resolves.

Common Failure Patterns and Troubleshooting

Behavioral Problems and Their Causes

Water Quality Failure Patterns

Water quality failures follow predictable patterns that keepers can identify and correct. The most common failure is ammonia or nitrite elevation following overfeeding, filter maintenance, or adding new fish. When ammonia rises, stop feeding until it returns to zero, increase water changes, and check filter function. When nitrite rises, add salt to protect fish from nitrite toxicity and increase water changes.

Nitrate accumulation indicates inadequate water change frequency or excessive stocking. When nitrate exceeds 40 mg/L, increase water change volume or frequency and evaluate stocking density. Persistent high nitrate despite regular water changes suggests the tank is overstocked or the filter is not processing waste effectively.

Temperature fluctuations stress oscars and predispose them to disease. Heaters fail, chillers malfunction, and ambient temperature changes affect tank temperature. Monitor temperature daily and use backup heating or cooling systems in facilities where temperature control is critical.

Disease Outbreak Response

When a disease outbreak occurs, respond systematically. First, test water quality and correct any abnormalities. Second, isolate affected fish in a hospital tank to prevent disease spread. Third, observe affected fish carefully and document clinical signs. Fourth, consult a veterinarian for diagnosis and treatment recommendations. Fifth, implement treatment as directed and monitor response.

The oscar case report demonstrates the importance of integrated disease management. The fish experienced a mild Argulus infestation that was treated with diflubenzuron. Following treatment, bacterial infection developed in stressed fish, requiring antibiotic therapy and topical care. The successful outcome depended on addressing the parasitic infestation, treating the bacterial infection with appropriate antibiotics, improving water quality, and providing supportive care.

Do not treat fish without a diagnosis. Misdiagnosis leads to ineffective treatment, wasted resources, and increased stress on fish. When in doubt, consult a veterinarian with experience in fish medicine.

Welfare and Safety Considerations

Fish Welfare Standards

Fish welfare is an emerging concern in ornamental aquaculture. The Food and Agriculture Organization of the United Nations provides resources on animal production that include welfare considerations for aquatic animals. The World Organisation for Animal Health sets standards for animal health and welfare that apply to fish production systems. These standards emphasize providing appropriate environmental conditions, nutrition, and health care.

For oscars, welfare considerations include adequate tank size, appropriate water quality, proper nutrition, and environmental enrichment. Fish that cannot express natural behaviors or that experience chronic stress have poor welfare. Signs of poor welfare include suppressed appetite, reduced growth, abnormal behavior, and increased disease susceptibility.

The USDA National Agricultural Library provides resources on animal health and welfare that apply to fish production. These resources cover topics such as housing, nutrition, health care, and humane handling. Fish keepers should be familiar with welfare standards and incorporate them into facility management.

Worker Safety in Fish Facilities

Working with fish involves physical and biological hazards. Heavy tanks, water handling, and electrical equipment pose physical risks. Biological hazards include zoonotic pathogens, antibiotic-resistant bacteria, and allergens from fish proteins.

Use proper lifting techniques when moving tanks or equipment. Ensure electrical equipment is properly grounded and protected from water contact. Use gloves when handling fish or cleaning tanks, particularly when fish are diseased. Wash hands thoroughly after working with fish or tank water.

The USDA Agricultural Research Service conducts research on animal production and protection that includes fish health and safety. This research informs best practices for fish facility management and worker safety.

Regulatory Context for Ornamental Fish

Ornamental fish production and trade are subject to regulations that vary by jurisdiction. The U.S. Food and Drug Administration regulates animal drugs, including those used in fish. The USDA National Agricultural Library provides information on animal health and welfare regulations. The World Organisation for Animal Health sets international standards for aquatic animal health.

Fish keepers should be aware of regulations governing antibiotic use, fish transport, and disease reporting. Some diseases are reportable to animal health authorities, and failure to report can result in penalties. Consult local regulations and animal health authorities for specific requirements.

Professional Escalation Criteria

When to Consult a Veterinarian

Many oscar health problems can be managed with good water quality and husbandry. However, some situations require professional veterinary intervention. Consult a veterinarian when fish show severe clinical signs, when disease does not respond to initial treatment, when multiple fish are affected, or when you are uncertain about diagnosis or treatment.

Specific escalation criteria include:

• Mortality exceeding 10 percent of the affected population within 48 hours
• Severe clinical signs such as exophthalmia, ascites, or hemorrhagic lesions
• Disease that persists or worsens despite 3 days of appropriate treatment
• Suspected notifiable disease
• Need for prescription medications
• Uncertainty about diagnosis or treatment approach

Diagnostic Services and Necropsy

When fish die, necropsy provides valuable diagnostic information. A veterinarian can perform necropsy to identify the cause of death and guide treatment for surviving fish. Necropsy findings include gross lesions, histopathology, and microbiological culture results.

The oscar case report used comprehensive diagnostic testing, including microbiological analysis of ascitic fluid, hematology, and histopathology. These tests identified the bacterial pathogens, characterized the anemia and leukocytosis, and documented the tissue damage. This level of diagnostic work is appropriate when disease outbreaks cause significant mortality or when standard treatments fail.

Record Keeping for Veterinary Consultation

When consulting a veterinarian, provide complete records including water quality history, feeding records, treatment history, and clinical observations. This information helps the veterinarian make an accurate diagnosis and recommend appropriate treatment. Keep treatment records current and include drug names, doses, routes of administration, and outcomes.

Frequently Asked Questions

What is the minimum tank size for a single oscar fish?

A single adult oscar requires a minimum of 450 liters. Oscars grow to 30 to 35 centimeters and produce substantial waste, so smaller tanks lead to stunted growth, poor water quality, and health problems. A bonded pair needs at least 750 liters. For production facilities, calculate tank volume based on expected adult biomass and filtration capacity.

How often should I change water in an oscar tank?

Change 25 to 30 percent of the water weekly for stocked tanks. Increase water change frequency when nitrate exceeds 40 mg/L, when ammonia or nitrite appears, or after adding new fish. During disease outbreaks, more frequent water changes help reduce pathogen load and support fish recovery.

What should I feed my oscar fish?

Feed a varied diet of high-quality cichlid pellets with 35 to 45 percent protein, supplemented with frozen or fresh foods such as bloodworms, brine shrimp, krill, and chopped fish or shrimp. Feed juveniles 2 to 3 small meals daily and adults 1 to 2 meals daily. Feed only what fish consume within 2 to 3 minutes per meal.

How can I prevent disease in my oscar tank?

Prevent disease by maintaining excellent water quality, quarantining new fish for 4 to 6 weeks, providing appropriate nutrition, and reducing stress. Monitor water parameters regularly and keep records. Avoid using antibiotics prophylactically, as this selects for resistant bacteria. Address any water quality abnormality immediately.

What are the signs of a sick oscar fish?

Signs of illness include lethargy, hiding, refusing food, flashing or rubbing against objects, rapid gill movement, visible lesions or spots, protruding eyes, abdominal swelling, and erratic swimming. Changes in behavior often precede visible signs of disease. Isolate sick fish and consult a veterinarian if signs persist or worsen.

Can I keep multiple oscars in one tank?

Oscars are territorial and may fight, especially in tanks that are too small. A single oscar avoids aggression issues. Keeping a bonded pair requires at least 750 liters with multiple territories and hiding places. Introducing new oscars to an established tank often results in aggression, so quarantine and careful introduction are essential.

What water parameters do oscar fish need?

Maintain water temperature between 24 and 28 degrees Celsius, pH between 6.5 and 7.5, and hardness between 5 and 20 dGH. Ammonia and nitrite must remain at zero. Nitrate should stay below 40 mg/L. Stability matters more than exact values, so avoid rapid fluctuations in any parameter.

When should I use antibiotics for my oscar fish?

Use antibiotics only when a bacterial infection is confirmed or strongly suspected, following veterinary guidance. Never use antibiotics prophylactically in healthy fish. Isolate affected fish in a hospital tank to reduce the volume of medicated water. Complete the full treatment course and keep records of all treatments.

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References and Further Reading

• FAO Animal Production and Health. Food and Agriculture Organization of the United Nations.
• Animal Health and Welfare. USDA National Agricultural Library.
• Animal and Veterinary Resources. U.S. Food and Drug Administration.
• Animal Health and Welfare. World Organisation for Animal Health.
• Animal Production and Protection. USDA Agricultural Research Service.
• Occurrence of Argulus sp. Infestation with Dual Bacterial Co-infection Caused by Aeromonas hydrophila and Enterococcus faecalis in Oscar Fish (Astronotus ocellatus): A Case Report.. Veterinaria italiana, 2026.
• Preliminary model assessing the cost-effectiveness of preoperative chlorhexidine mouthwash at reducing postoperative pneumonia among abdominal surgery patients in South Africa.. PloS one, 2021.
• Clinicogenomic and treatment outcomes in RET fusion-positive NSCLC: A multicenter study in Latin American Hispanic patients.. Cancer treatment and research communications, 2025.
• Genome-wide association meta-analysis of fish and EPA+DHA consumption in 17 US and European cohorts.. PloS one, 2017.
• The Armed Conflict and the Impact on Patients With Cancer in Ukraine: Urgent Considerations.. JCO global oncology, 2022.
• Alveolar soft part sarcomas in young patients: The French national NETSARC+ network experience.. European journal of surgical oncology : the journal of the European Society of Surgical Oncology and the British Association of Surgical Oncology, 2024.
• Seafood Consumption, Omega-3 Fatty Acids Intake, and Life-Time Prevalence of Depression in the PREDIMED-Plus Trial.. Nutrients, 2018.
• Recurrent Alternate Parthenogenesis in the Common Smooth-Hound Shark (&lt,i&gt,Mustelus mustelus&lt,/i&gt,) with Additional Cases and Further Evidence for a Putative Adaptive Reproductive Strategy.. 2026.
• A serum cytotoxicity assay for measuring the resistance of turbot to the ciliate Philasterides dicentrarchi. 2025.
• Comparison of Tricaine Methanesulfonate (MS-222) and Alfaxalone Anesthesia in Bluegill Fish (Lepomis macrochirus). 2025.
• Antibiotic Abuse in Ornamental Fish: An Overlooked Reservoir for Antibiotic Resistance.. 2025.
• Behavioral, physiological, encephalopathological alterations and endoplasmic reticulum stress/apoptotic-related gene transcription in reaction to heat stress in Oreochromis niloticus fish: impact of dietary supplements with Spirulina-Coenzyme Q10 nanoemulsion.. 2026.
• Smartphone region-wise image indoor localization using deep learning for indoor tourist attraction.. 2024.
• Eating fish and fruits are associated with lower prevalence of allergic diseases.. Respiratory medical research, 2020.
• Contributions of the PURE Study to the Definition of a Healthy Diet for the Prevention of Cardiovascular Diseases. Revista de Investigación e Innovación en Ciencias de la Salud, 2026.
• Parasitic Diseases in Cultured Marine Fish in Northwest Mexico. 2012.
• Potential probiotic yeasts isolated from the fish gut protect zebrafish (Danio rerio) from a Vibrio anguillarum challenge. Frontiers in Microbiology, 2015.
• Delta-8 desaturation activity varies among fatty acyl desaturases of teleost fish: high activity in delta-6 desaturases of marine species.. Comparative Biochemistry and Physiology Part B Comparative Biochemistry, 2011.

This article is educational and is not a substitute for veterinary diagnosis, treatment, public-health guidance, or regulatory reporting.