Amazon Leaffish

Monocirrhus polyacanthus is found throughout the Amazon and Orinoco river systems in blackwater habitats rich in tannins and leaf litter. Its remarkably convincing leaf mimicry extends to a chin barbel that resembles a leaf stalk, cryptic brown colouration with faux leaf vein markings, and a drifting head-down swimming posture. It is a demanding species requiring soft, acidic water and a live food diet.

Water: 24–28 °C, pH 5.5–7.0, soft and acidic blackwater; tannin-stained conditions preferred. Tank: 100 L minimum; leaf litter substrate, dark water, driftwood, and dim lighting. Feeding: Strictly carnivorous; live feeder shrimp and small fish required; very rarely accepts frozen foods. Behaviour: Solitary ambush predator; slow-drifting; do not disturb when not feeding. Compatibility: Species tank only; eats any fish that fits in its mouth.