Wallago attu

Family: Siluridae

Wallago attu — a Siluridae from South Asia. Reaches 187.5–275 cm; keep at 22–30 °C.

Care parameters

Water temperature
22–30 °C
pH
6.5–7.5
GH hardness
5–15 dGH
Adult length
187.5–275 cm
Minimum tank
500 L
Water layer
Middle of the water column
Difficulty
Moderate
Temperament
Predatory; swallows fish close to its mouth size
Origin
South Asia

Species overview

Wallago attu is a Siluridae from South Asia. In the wild it prefers slow rivers and lakes; in the aquarium it stays predatory. Plan on 187.5–275 cm of adult fish at 22–30 °C. In a community tank it pairs well with Similar-sized peaceful community fish.

Native biotope

Habitat
Slow rivers and lakes
Flow
Still to gentle current
Dissolved O₂
Moderate

Aquascape & hardware

Substrate
Sand and mud
Hardscape
Large hiding structures
Plants
Sparse

Temperament, diet & tankmates

Schooling
Singles or small groups
Diet
Carnivore
Recommended tankmates
  • Similar-sized peaceful community fish — Similar size and water needs
Avoid keeping with
  • Much smaller fish — May outcompete or bully tiny tankmates

Breeding & notes

Sexual dimorphism
Hard to distinguish
Breeding method
Not bred in captivity

Frequently asked questions

Is Wallago attu easy to keep?

Intermediate difficulty. Predatory; swallows fish close to its mouth size; singles or small groups.

What temperature and water chemistry does Wallago attu need?

Aim for 22–30 °C. Stable temperate range; 22–30 °C curated husbandry range.

How big does Wallago attu get, and what tank size?

Adults reach 187.5–275 cm; it is middle of the water column. Plan for at least 500 litres.

What does Wallago attu eat?

Carnivore. Feed two small meals a day rather than one large one.

Can Wallago attu live with other fish?

Yes, with care. Predatory; swallows fish close to its mouth size — pair it with Similar-sized peaceful community fish — Similar size and water needs and skip Much smaller fish — May outcompete or bully tiny tankmates.

Where does Wallago attu come from?

Comes from South Asia: slow rivers and lakes. Expect still to gentle current and moderate.

How does Wallago attu breed?

Not bred in captivity. Hard to distinguish.