Hoplisoma armatum

A deeper body and long, slightly curved dorsal spine, unlike the shorter, straighter spine of loretoense.

A deeper body and long, slightly curved dorsal spine contrast with the shorter, straighter spine of loretoense.

Adult length

Up to 6.5 cm (standard length, without the tail fin)

Water temperature

22–26 °C

Lifespan

5–10 years

pH

6–7.5

Hardness

2–12 dGH

Natural habitat

Native to the upper Amazon basin.

Quoted maximum length excludes the tail.