Gastrodermus gracilis

An arched dark stripe crosses a pale body and ends at the upper tail-ray bases.

An arched dark stripe crosses a pale body and ends at the upper tail-ray bases rather than descending into the lower tail base as in some lookalikes.

Adult length

Up to 4 cm (standard length, without the tail fin)

Water temperature

20–26 °C

Lifespan

5–10 years

pH

5–7.5

Hardness

2–12 dGH

Natural habitat

Native to the middle and lower Amazon basin.

Quoted maximum length excludes the tail.