Cleithracara maronii

The keyhole-shaped black mark on each flank is its most recognizable feature.

The keyhole-shaped black mark on each flank is its most recognizable feature. When frightened, it darkens markedly and retreats into plants or driftwood.

Adult length

Up to 11 cm (standard length, without the tail fin)

Water temperature

21–28 °C

Lifespan

8–10 years

pH

4–7.5

Hardness

2–15 dGH

Natural habitat

Inhabits clear, slow coastal creeks rich in decaying wood.

Rather shy; avoid aggressive territorial fish. Usually peaceful outside breeding, but territorial while guarding eggs.