Silver Arowana

Osteoglossum bicirrhosum

A magnificent surface-cruising predator that reaches three feet and leaps for prey.

Water

Freshwater

Temperature

75–82°F

pH

6–7.5

Hardness

2–12 dGH

Max size

36 in

Min tank

250 gal

Temperament

Aggressive

Social

Solitary

Swim level

Top

Diet

Carnivore

Care level

Expert

Lifespan

10-20 years

Breeding

Mouthbrooder

Suitability

Expert

Origin

Amazon basin

Arowanas are spectacular but grow huge, are powerful jumpers needing a heavy covered lid, and require an enormous tank — strictly for dedicated, experienced keepers with the space.