A fascinating but highly aggressive bagrid catfish from Myanmar that spends almost its entire life swimming inverted. Unlike the peaceful African Synodontis upside-down catfish, the Asian variety grows large, is fiercely territorial, and will predate on smaller tank mates. They require ample driftwood or caves to rest underneath during the day.
Asian Upside Down Catfish At a Glance
Asian Upside Down Catfish Tank Requirements
Will Asian Upside Down Catfish fit in your tank?
Care guides tell you what Asian Upside Down Catfish needs, the next question is whether your tank can safely provide it. Test Asian Upside Down Catfish against your tank size, maintenance needs, and the fish you already keep before you buy.
Useful setup supplies
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Asian Upside Down Catfish Water Parameters
Water care products
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Asian Upside Down Catfish Temperament & Compatibility
Asian Upside Down Catfish Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Adult (Standard)
Fully grown adults are solitary, highly territorial predators. They are intolerant of their own kind and must be housed with robust, large fish that occupy different swimming zones and cannot fit into their mouths (e.g., large barbs, large cichlids).
Differs in 1 trait from base species
Also known as: Adult Black Upside Down Catfish
Juvenile (Grow-out)
Often sold in the aquarium trade at just 5-7cm and incorrectly assumed to be the peaceful African species. While they can be temporarily kept in smaller tanks, they grow fast and will rapidly begin hunting smaller community fish (like tetras and rasboras). Warning: Will outgrow a standard community setup.
Differs in 6 traits from base species
Also known as: Baby Upside Down Catfish, Juvenile
Asian Upside Down Catfish Care Guide Summary
The Asian Upside Down Catfish, scientifically known as Mystus leucophasis, belongs to the Catfish family group. Adults reach a maximum size of approximately 30 cm and have a fusiform body shape with a fast growth rate. Classified as aggressive, this species primarily occupies the mid-level and bottom zones of the aquarium and produces a high level of biological waste.
To thrive, the Asian Upside Down Catfish requires a freshwater only aquarium with a minimum volume of 380 litres and a tank length of at least 120 cm. Water temperature should be maintained between 23°C and 27°C, with a pH range of 6–8 and a general hardness of 5–20 dGH. A moderate water flow is preferred.
Due to its specialist needs, the Asian Upside Down Catfish is best suited for fishkeepers who can provide a carefully planned setup. This species is available in 2 varieties: Adult (Standard) and Juvenile (Grow-out). Each may differ slightly in size, temperament, or care needs, so it is worth checking the specific requirements of the variety you plan to keep.
Asian Upside Down Catfish Habitat Setup
When setting up an aquarium for the Asian Upside Down Catfish, a moderate water flow best suits their natural preferences. Because this species occupies the mid-level and bottom zones, the aquarium layout should prioritise open swimming space in the centre of the tank for free movement and sufficient floor space with hiding spots among rocks, wood, or dense planting. Useful additions include smooth gravel or rounded substrate to protect their sensitive barbels and driftwood, which can serve as both a hiding place and a dietary supplement.
Asian Upside Down Catfish Compatibility Notes
Classified as aggressive, the Asian Upside Down Catfish is best housed alone, as they do not tolerate others of their kind in confined spaces. When choosing tankmates, any fish small enough to fit in its mouth will likely be eaten, ornamental shrimp are not safe companions, conspecific aggression can be intense, especially in smaller tanks, and territorial behaviour may cause issues if hiding spots or floor space are limited. Selecting tankmates that favour different water layers from the mid-level and bottom zones can help reduce competition and territorial overlap.
Asian Upside Down Catfish Recommended Tank Sizes
Standard aquarium sizes that meet the minimum volume and length requirements for Asian Upside Down Catfish.
Asian Upside Down Catfish Feeding & Diet Considerations
The Asian Upside Down Catfish is a predatory species that will readily consume small fish, so nano or bite-sized tankmates should be avoided, will hunt and eat ornamental shrimp, making it unsuitable for shrimp-focused setups, and is primarily active at dusk and dawn, so offering food shortly after lights-off ensures it receives adequate nutrition.
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Frequently Asked Questions About Asian Upside Down Catfish
How big does Asian Upside Down Catfish get?
Asian Upside Down Catfish (Mystus leucophasis) typically reaches a maximum adult size of approximately 30 cm. They have a fusiform body shape and a fast growth rate.
What tank size does Asian Upside Down Catfish need?
A minimum aquarium volume of 380 litres and a tank length of at least 120 cm are recommended for Asian Upside Down Catfish. This ensures enough swimming space and helps maintain stable water conditions.
What water parameters does Asian Upside Down Catfish need?
Asian Upside Down Catfish thrives in freshwater only conditions with a temperature range of 23–27°C, a pH between 6 and 8, and a general hardness of 5–20 dGH. A moderate water flow is preferred.
Is Asian Upside Down Catfish peaceful or aggressive?
Asian Upside Down Catfish is classified as aggressive with an aggression score of 8 out of 10. Careful tankmate selection is essential to avoid conflict.
Can Asian Upside Down Catfish live with others of its kind?
No. Only one Asian Upside Down Catfish should be kept per tank. Keeping multiples in the same aquarium typically results in aggression and stress.
Is Asian Upside Down Catfish safe with shrimp?
No. Asian Upside Down Catfish is known to eat ornamental shrimp and is not recommended for shrimp tanks. Even larger shrimp species like Amano Shrimp may be at risk.
Does Asian Upside Down Catfish have any special tank requirements?
Yes. Asian Upside Down Catfish benefits from driftwood (digestion/hiding) and smooth gravel (sensitive barbels) in the aquarium. These features help replicate their natural habitat and promote overall health and well-being.
Plants That Suit Asian Upside Down Catfish
These plants pair well with Asian Upside Down Catfish based on shared water preferences, layout fit, and how likely they are to hold up in the same aquarium.
African Onion Plant
Crinum calamistratum
Afzel's Anubias
Anubias afzelii
Amazon Sword
Echinodorus amazonicus
Anubias Barteri
Anubias barteri
Ashy Pipewort
Eriocaulon cinereum
Balansae
Cryptocoryne crispatula
Fish Similar to Asian Upside Down Catfish
Freshwater Shark (Wallago)
Wallago attu
An apex predator native to South and Southeast Asia, infamous for its immense size, huge mouth, and voracious predatory nature. It will consume any tank mate that fits into its capacious mouth and is known to bite aggressively when handled. This species is utterly unsuitable for standard home aquariums and requires an enormous custom pond or public aquarium setup.
Asian Arowana
Scleropages formosus
A highly prized, CITES-protected 'monster fish' known as the Dragon Fish. They are powerful, surface-dwelling predators that require massive aquariums and pristine water quality. Notorious jumpers, they require heavy, secure lids. Because of intense territoriality, they must be kept strictly solitary or in large 'comm' (community) groups of 5+ to disperse aggression.
Glass Catfish
Kryptopterus vitreolus
A highly unique, completely transparent catfish from Thailand. Unlike most catfish, they are mid-water swimmers that require being kept in schools to feel secure. They are incredibly peaceful and easily outcompeted for food. They require stable water parameters and dim lighting or shaded areas provided by floating plants.
Iridescent Shark
Pangasianodon hypophthalmus
The Iridescent Shark is not a true shark, but a highly active, schooling catfish native to Southeast Asia. While frequently sold as tiny juveniles, they are notorious 'tank busters' that grow to massive sizes. They are extremely skittish and easily spooked, often injuring themselves by crashing into aquarium glass. They are best suited for heated indoor ponds or massive custom aquariums.
Pictus Catfish
Pimelodus pictus
An extremely active, striking silver catfish with black spots and incredibly long barbels, native to South America. While peaceful toward similarly sized tank mates, they are highly effective nocturnal predators that will easily swallow small fish (like Neon Tetras) whole. They are scaleless and possess sharp pectoral spines that can easily become entangled in aquarium nets.
Wels Catfish (European Catfish)
Silurus glanis
The Wels Catfish is a massive, highly predatory freshwater fish native to Eastern Europe and parts of Asia. As one of the largest freshwater fish in the world, it is wholly unsuited for standard home aquariums and requires a heavy-duty heated indoor pond or massive custom setup. They are highly opportunistic predators that will swallow any tank mate that fits into their enormous mouths.