Eclipse Catfish Care Guide 2026: Tank Size, Diet & More

Eclipse Catfish Care requires dedication, space, and understanding of this magnificent species. The Eclipse Catfish, also known as the Sun Catfish or Horabagrus brachysoma, is a stunning freshwater fish that has unfortunately become a victim of misleading marketing in the aquarium trade. Often sold as cute, manageable juveniles only a few inches long, these fish grow into impressive predators reaching 18 inches or more.

Native to the rivers of Southwest India, this species carries a vulnerable conservation status on the IUCN Red List. Habitat loss, pollution, and overharvesting for the aquarium trade threaten wild populations. Responsible keepers must understand the commitment required: a massive aquarium of 200 gallons or more, compatible large tank mates, and the acceptance that these nocturnal giants will transform your living room into a showcase for one of nature's most striking catfish.

This comprehensive Eclipse Catfish Care Guide covers everything from proper tank size and water parameters to feeding techniques for these shy, bottom-dwelling predators. Whether you are considering adding a Sun Catfish to your collection or already have one and need guidance on proper care, this updated guide for 2026 provides the critical information you need for success.

Species Summary

Scientific Name:	Horabagrus Brachysoma
Family:	Bagridae
Other Names:	Sun catfish, Solar catfish, Gunther's catfish, Bullseye catfish, Golden red-tail catfish, Manjakoori
Care Level:	Intermediate to Advanced
Temperament:	Peaceful but predatory with smaller fish
Color Form:	Yellowish-brown with dark spots
Conservation Status:	IUCN Vulnerable
Lifespan:	Up to 10 years with proper care
Size:	12-18 inches (30-45 cm)
Water Temperature:	72-78°F (optimal 74-77°F)
Diet:	Omnivore with carnivorous tendencies
Minimum Tank Size:	200 gallons (6ft x 2ft x 2ft minimum)
Tank Setup:	Freshwater with soft sand, caves, driftwood, dim lighting
Compatibility:	Large fish only: Bichirs, Plecos, Arowanas, large Cichlids, Silver dollars
Water Hardness:	5-25 dGH
pH Level:	6.0-7.5

Eclipse Catfish Appearance

The appearance of Eclipse Catfish is truly captivating and explains their popularity among serious aquarists. They display a striking yellowish-brown base coloration adorned with dark, almost black spots scattered across their body. The most distinctive feature is the eclipsed or bullseye-like pattern that gives them their common name.

These fish possess elongated, slightly flattened bodies with long, flowing fins that are typically dark or black in color. Their heads are notably large with prominent eyes adapted for their nocturnal lifestyle. Four pairs of long barbels extend from their mouth, helping them navigate and locate food in dim conditions.

Their graceful fins make them surprisingly agile swimmers despite their size. While they often rest on the bottom during daylight hours, they become active swimmers at night, exploring the middle and lower water columns. The contrast between their golden body and dark markings creates a stunning visual effect under dim aquarium lighting.

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Eclipse Catfish Size And Growth Rate

When it comes to the size of Eclipse Catfish, adult specimens reach between 12 and 18 inches (30 to 45 cm) in length. Some exceptional individuals may even exceed these measurements. This substantial size makes them true monster fish that require appropriately massive aquariums.

The Eclipse Catfish is a relatively slow-growing species, which creates a dangerous misconception in the pet trade. Juveniles often sold at 2-3 inches can take several years to reach their full adult size. This slow growth rate leads many unsuspecting hobbyists to purchase them for inappropriately small tanks, not realizing the massive commitment they are undertaking.

When fed properly with high-quality foods, these fish can grow approximately 4 inches in just three months during their juvenile phase. However, growth typically slows as they mature. Regular feeding with protein-rich foods supports healthy development, though you should avoid overfeeding which can lead to obesity and water quality issues.

Eclipse Catfish Lifespan

Eclipse Catfish lifespan is around ten years when provided with optimal care and appropriate living conditions. This decade-long commitment is another factor potential keepers must seriously consider before acquiring one of these magnificent fish.

Achieving the full ten-year lifespan requires dedication to maintaining pristine water conditions, providing a spacious aquarium, and offering a varied, nutritious diet. Fish kept in undersized tanks or poor water quality typically suffer shortened lifespans and increased disease susceptibility.

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Eclipse Catfish Natural Habitat and Distribution

Understanding the natural habitat of Eclipse Catfish is essential for creating appropriate captive conditions. These fish are endemic to Southwest India, specifically found in the states of Kerala and Karnataka. Their native range includes the Periyar River system, Chalakudy River, Nethravathi River, and the vast Vembanad Lake.

In the wild, Eclipse Catfish inhabit slow-moving rivers, streams, backwaters, and swamps with muddy or sandy substrates. They prefer turbid, blackwater conditions where tannins from decaying vegetation stain the water brown. These dimly lit environments explain their nocturnal behavior and preference for dark hiding spots in aquariums.

Notably, introduced populations have established themselves in Puerto Rico, where they have adapted to local waterways. However, their native Indian populations face serious threats from habitat destruction, pollution, and overcollection for the aquarium trade, leading to their vulnerable IUCN status.

Eclipse Catfish Conservation Status

The Eclipse Catfish carries a vulnerable classification on the IUCN Red List, meaning they face a high risk of extinction in the wild. This status reflects the serious threats facing their native populations in India. Habitat loss due to deforestation, agricultural expansion, and urban development has destroyed critical river ecosystems.

Pollution from industrial and agricultural runoff degrades water quality in their native rivers. Additionally, overharvesting for the international aquarium trade puts pressure on wild stocks. While captive breeding programs at institutions like NBFGR Kochi have had some success, most specimens in the trade remain wild-caught.

Responsible aquarists should seek out captive-bred specimens when possible and support conservation efforts. Providing excellent care for your Eclipse Catfish honors the wild populations facing serious challenges in their native Southwest India.

Eclipse Catfish Breeding

Breeding Eclipse Catfish in captivity remains extremely challenging and largely undocumented in home aquariums. Most successful breeding has occurred in professional facilities with massive tanks and carefully controlled conditions. Scientists at NBFGR Kochi in India have achieved captive breeding, providing hope for conservation efforts.

To encourage spawning, aquarists should provide enormous planted tanks exceeding 300 gallons with plenty of hiding places. The water temperature should be maintained at the higher end of their range, around 77-78°F, with a pH between 6.5-7.0. Heavy feeding with live foods such as bloodworms and brine shrimp may help condition fish for spawning.

Floating plants can help diffuse lighting and create a more natural spawning environment. If spawning occurs, parents should be removed immediately, as Eclipse Catfish may consume their own eggs. Eggs typically hatch within 3 to 5 days, with fry becoming free-swimming approximately one week after hatching. Fry require live foods or extremely fine flake food.

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Eclipse Catfish Behavior And Temperament

The behavior and temperament of Eclipse Catfish can best be described as peaceful, shy, and gregarious. Contrary to outdated advice suggesting solitary keeping, these fish are naturally social and thrive in groups of five or more specimens when provided with adequate space. Their scientific classification places them in the Bagridae family, known for generally peaceful dispositions among catfish.

As nocturnal creatures, Eclipse Catfish are most active during evening and nighttime hours. During daylight, they prefer to hide in dark caves, under driftwood, or among dense vegetation. This shy nature means they may not be visible much during the day, which aquarists should consider before purchasing.

While generally peaceful toward appropriately sized tank mates, Eclipse Catfish are opportunistic predators that will consume any fish small enough to fit in their mouths. They are bottom-dwellers that spend most of their time near the substrate, though they will swim throughout the water column at night.

Eclipse Catfish Care

Eclipse Catfish Care requires intermediate to advanced fishkeeping experience. While they are not particularly demanding regarding water chemistry, their substantial size, heavy bioload, and specific environmental needs present significant challenges for inexperienced aquarists.

These fish require massive aquariums with excellent filtration to handle their waste production. They prefer soft, sandy substrates for burrowing and exploring. Ample hiding spots created from caves, driftwood, and rocks help reduce stress and encourage natural behaviors.

Water quality is paramount for Eclipse Catfish health. Their heavy bioload means ammonia, nitrite, and nitrate levels must be carefully monitored. Regular water changes are essential, with weekly changes of 25-30% recommended to maintain optimal conditions. They are sensitive to sudden parameter changes, so stability is key.

Sensitive barbels make these fish vulnerable to rough substrates and poor water conditions. Watch for signs of barbel erosion, which indicates water quality issues or inappropriate substrate. Maintaining pristine conditions helps prevent common diseases and ensures these long-lived fish reach their full lifespan potential.

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Eclipse Catfish Tank Size Requirements

The tank size for Eclipse Catfish is one of the most critical aspects of their care and represents the most significant barrier to ownership. A minimum tank size of 200 gallons is absolutely required for a single adult specimen. This translates to aquarium dimensions of at least 6 feet long by 2 feet wide by 2 feet high (180cm x 60cm x 60cm).

Seriously Fish recommends aquarium dimensions of 60 inches x 24 inches x 24 inches as the absolute minimum for one fish. If keeping the recommended group of five or more specimens, you must provide exponentially larger accommodations, typically 300-500 gallons or more.

Outdated recommendations suggesting 50-75 gallon tanks are dangerously incorrect and can cause stunted growth, poor health, and shortened lifespans. These fish need room to swim, turn around comfortably, and establish territories. Anything smaller causes chronic stress and physical deformities.

Some aquarists use grow-out tanks for juveniles, but you must have a permanent, appropriately sized aquarium ready before the fish outgrows temporary housing. Planning for their adult size from the beginning prevents emergency rehoming situations that rarely end well for these specialized fish.

Eclipse Catfish Water Parameters

Water Parameters for Eclipse Catfish are as follows:

• pH level: 6.0 – 7.5
• Water hardness: 5 – 25 dGH
• Temperature: 72°F - 78°F (optimal range 74-77°F)

Eclipse Catfish are freshwater species adaptable to various water conditions within these ranges. They prefer slightly acidic to neutral pH levels and soft to moderately hard water. Temperature should remain stable between 72-78°F, with 74-77°F being optimal for their metabolism and immune function.

Check ammonia, nitrite, and nitrate levels frequently, as these parameters rise quickly with the substantial waste Eclipse Catfish produce. Ammonia and nitrite should always read zero, while nitrates should be kept below 40 ppm through regular water changes and adequate filtration.

Consider adding Indian almond leaves or other botanicals to create blackwater conditions that mimic their natural habitat. These tannins not only lower pH slightly but also provide antibacterial benefits and create the dim, tea-colored water these fish prefer.

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Eclipse Catfish Filtration

Filtration is absolutely critical for Eclipse Catfish tanks due to the enormous amount of waste these large fish produce. A canister filter rated for at least two to three times your tank's volume is essential. For a 200-gallon tank, you need filtration rated for 400-600 gallons or multiple smaller units.

Biological filtration capacity must be substantial to handle the nitrogen load. Multiple canister filters or a combination of canister and sump filtration work well for these demanding setups. The goal is maintaining zero ammonia and nitrite with minimal nitrate accumulation between water changes.

Water flow should be moderate rather than strong. Eclipse Catfish prefer slow-moving water similar to their natural habitat. Adjust filter outputs or add spray bars to diffuse strong currents that might stress these fish.

Some recommended filters for Eclipse Catfish are:

• Fluval FX6 or FX4 High-Performance Canister Filter
• Eheim Professional 4+ Canister Filter
• SunSun HW-304B Canister Filter

Heating

Heating is necessary for Eclipse Catfish tanks because they originate from tropical waters. The water temperature should be maintained between 72°F and 78°F, with 74-77°F being the optimal range. Use a reliable aquarium heater with adequate wattage for your tank size.

For a 200+ gallon aquarium, you likely need two heaters positioned at opposite ends of the tank to ensure even heat distribution. This redundancy also provides backup if one heater fails. Always use a separate thermometer to verify heater accuracy.

Some commonly used heaters are:

• Eheim Jager Aquarium Thermostat Heater
• Flval E Electronic Heater
• Aqueon Pro Submersible Aquarium Heater

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Lighting

Lighting should be minimal for Eclipse Catfish. As nocturnal fish from dimly lit blackwater environments, they prefer subdued illumination. Bright lighting causes stress and keeps them hiding constantly. Use low-output LED lights or heavily planted tanks with floating vegetation to diffuse light.

If you wish to view your Eclipse Catfish during their active nighttime hours, consider installing moonlight LEDs that provide gentle blue illumination without disturbing their natural behavior. This allows observation while respecting their crepuscular nature.

Indian almond leaves, driftwood, and other botanicals help create the dim, tannin-stained water these fish prefer. These additions not only reduce light penetration but also provide natural antibacterial properties and contribute to authentic blackwater conditions.

Plants and Decor

Plants are not strictly necessary for Eclipse Catfish but can enhance their environment when chosen appropriately. Select hardy, low-light species that tolerate the dim conditions and soft water these fish prefer. Anubias and Microsorum (Java Fern) are excellent choices that attach to driftwood and rocks.

Cryptocoryne species also work well in Eclipse Catfish tanks, as they tolerate low light and soft water. Floating plants like Water Lettuce or Amazon Frogbit provide shade and help diffuse lighting. Avoid delicate plants that may be uprooted by these active bottom-dwellers.

Decor must be carefully secured, as adult Eclipse Catfish are surprisingly strong and can dislodge improperly anchored items. Use aquarium-safe silicone to secure rocks and driftwood to the glass bottom. Provide at least one cave or hiding spot per fish using driftwood, rocks, or PVC piping.

Soft sand substrate is essential. Avoid gravel or sharp substrates that could damage their sensitive barbels. Pool filter sand or smooth aquarium sand works well and allows their natural burrowing behavior.

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Cleaning The Tank

Regular tank cleaning is essential for Eclipse Catfish health due to their heavy bioload. Perform weekly water changes of 25-30% to maintain water quality and remove accumulated nitrates. Use a gravel vacuum to clean the sand substrate during water changes.

Filter maintenance should occur monthly, rinsing mechanical media in old tank water to preserve beneficial bacteria. Never clean all filter media simultaneously, as this can crash your biological filtration. Stagger cleaning of different filter components across multiple maintenance sessions.

Monitor glass for algae buildup and clean as needed. However, some algae growth is normal and even beneficial in Eclipse Catfish tanks, as they may occasionally graze on algae and biofilm.

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Common Diseases and Health Issues

Common diseases affecting Eclipse Catfish include:

• Ich (White Spot Disease): Parasitic infection causing white spots on body and fins. Treat with elevated temperature (86°F) and ich medication containing malachite green or copper.
• Columnaris: Bacterial infection causing ulcers, frayed fins, and cotton-like patches. Treat with antibiotics such as kanamycin or nitrofurazone combined with clean water conditions.
• Fin Rot: Bacterial infection causing deteriorating fins. Treat with water changes and antibacterial medications like Maracyn or API Furan-2.
• Barbel Erosion: Caused by poor water quality or rough substrate. Requires immediate water quality improvement and smooth substrate replacement.

Prevention is always preferable to treatment. Maintain excellent water quality, quarantine new additions for at least two weeks, and provide proper nutrition to support immune function. Stress is the primary cause of disease in Eclipse Catfish, so minimize handling and environmental changes.

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Signs Of A Happy & Healthy Eclipse Catfish

The signs of a happy and healthy Eclipse Catfish are:

• Active swimming and exploration during evening hours
• Strong appetite and enthusiastic feeding response
• Clear, intact fins without tears or erosion
• Full, undamaged barbels extending from the mouth
• Shiny, intact scales with no visible wounds or patches
• No visible signs of disease such as white spots, lesions, or inflammation

If you observe these indicators, your Eclipse Catfish is likely thriving in its environment. Any deviation from normal behavior warrants immediate investigation of water parameters and tank conditions.

Eclipse Catfish Food and Diet

The diet of an Eclipse Catfish reflects their opportunistic, omnivorous nature with strong carnivorous tendencies. In the wild, they consume insects, crustaceans, small fish, and various organic matter. In captivity, they require varied, protein-rich foods to thrive.

As bottom-dwellers, they prefer food delivered to or near the substrate. Their nocturnal habits mean feeding after lights out yields the best results. Use sinking pellets, wafers, or target-feed with turkey basters to ensure they receive adequate nutrition before tank mates consume everything.

Recommended foods for Eclipse Catfish include:

• Live or frozen bloodworms: Excellent protein source that triggers natural feeding behaviors
• Live or frozen brine shrimp: Nutritious and readily accepted by most specimens
• Earthworms and tubifex worms: Natural prey items that provide excellent nutrition
• Mussels, prawns, and shrimp: Whole shellfish provide calcium and mental stimulation
• Quality sinking pellets: Choose carnivore or omnivore formulas for large catfish
• Occasional feeder fish: If offered, ensure they are disease-free from reliable sources

Supplement their diet with vegetables such as blanched cucumber, zucchini, and broccoli. While primarily carnivorous, the fiber from vegetables aids digestion and provides nutritional variety. Feed adults once daily or every other day, adjusting portions to prevent obesity.

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Eclipse Catfish Tank Mates

Selecting appropriate tank mates for Eclipse Catfish requires careful consideration of their predatory nature and substantial adult size. Small fish will be eaten. This is not a community tank species, and outdated recommendations suggesting small, peaceful fish like danios, rasboras, or dwarf gouramis are dangerously incorrect.

Compatible tank mates must be large enough that they cannot be swallowed whole. Seriously Fish and other authoritative sources recommend the following suitable companions:

• Bichirs (Polypterus species): Ancient, peaceful predators that coexist well with Eclipse Catfish
• Large Plecos (Loricariidae): Choose species reaching 12+ inches to avoid competition issues
• Arowanas: Large surface-dwelling fish that occupy different tank regions
• Silver Dollars: Large characins that are fast enough to avoid predation
• Large Cichlids: Oscars, Severums, and similar-sized cichlids can hold their own
• Datnioides (Tigerfish): Aggressive but compatible given adequate space
• Large Cyprinids: Tinfoil barbs and similar-sized fish work well

Avoid keeping Eclipse Catfish with other bottom-dwelling catfish species, as competition for territory and food can lead to aggression. When keeping multiple Eclipse Catfish together, provide at least two caves per fish and ensure the tank is enormous to minimize cannibalism risk, particularly among size-disparate individuals.

Important Tips for Eclipse Catfish Keepers

Essential tips for keeping Eclipse Catfish successfully:

• Plan for adult size: Never purchase based on cute juvenile appearance. These fish grow to 18 inches and need 200+ gallon tanks.
• Consider group keeping: Contrary to outdated advice, Eclipse Catfish are gregarious and do best in groups of 5+ when space allows.
• Watch for cannibalism: When keeping multiple specimens, size differences can trigger predatory behavior. Keep individuals of similar size.
• Secure all decor: Adults are surprisingly strong. Use silicone or other methods to secure heavy decorations that could injure fish if toppled.
• Feed after dark: As nocturnal fish, they feed best after lights out. Use sinking foods and target feeding to ensure they eat.
• Soft substrate only: Sand is essential. Gravel damages barbels and prevents natural burrowing behavior.
• Handle carefully: Barbels easily become entangled in nets. Use large, soft nets and minimize handling stress.
• Support conservation: Seek captive-bred specimens to reduce pressure on vulnerable wild populations.

Advantages Of Having Eclipse Catfish In Your Tank

The main advantages of keeping Eclipse Catfish are:

• Stunning appearance with unique coloration that becomes a focal point in large aquariums
• Peaceful temperament toward appropriately sized tank mates
• Fascinating nocturnal behaviors that reward patient observers
• Relatively easy water parameter requirements compared to some sensitive species
• Long lifespan of up to 10 years provides years of enjoyment
• Hardy nature once established in appropriate conditions

Disadvantages Of Having Eclipse Catfish In Your Tank

The main disadvantages of keeping Eclipse Catfish are:

• Enormous tank size requirement of 200+ gallons limits most aquarists
• Significant bioload requires heavy filtration and frequent maintenance
• Shy nature means limited visibility during daytime hours
• Predatory behavior makes them unsuitable for community tanks with small fish
• Long-term commitment of up to 10 years requires serious dedication
• Potential cannibalism when keeping multiple specimens
• Vulnerable conservation status raises ethical considerations about wild collection

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Frequently Asked Questions About Eclipse Catfish

Conclusion

Eclipse Catfish Care represents a serious commitment that only dedicated aquarists with appropriate resources should undertake. These magnificent fish from the rivers of Southwest India require massive aquariums of 200 gallons or more, compatible large tank mates, and a decade-long commitment to their wellbeing.

This comprehensive Eclipse Catfish Care Guide has covered the critical updates needed for 2026: the corrected tank size requirements, gregarious nature supporting group keeping, proper compatible tank mates, standardized temperature parameters, IUCN conservation status, and the cannibalism warnings essential for successful keeping. The misleading marketing that sells these fish as manageable juveniles has led to countless rehoming disasters.

If you can provide the substantial space, heavy filtration, and appropriate companions these vulnerable fish require, an Eclipse Catfish will reward you with years of fascinating nocturnal behavior and stunning visual appeal. For those unable to meet these demanding requirements, consider smaller catfish species better suited to modest aquariums. Thank you for reading this updated guide to responsible Eclipse Catfish Care.