Compressed Piranha

Serrasalmus compressus stands out among piranhas for its extreme lateral compression — the body is noticeably narrower than most Serrasalmus, a likely adaptation for hunting in dense flooded vegetation where manouverability is more important than raw bulk. It is found in blackwater systems across the Amazon basin.

This species demands the softest, most acidic water of any piranha in the trade. pH above 7.0 and hardness above 8 dGH will cause rapid deterioration. Tannin supplementation via driftwood, peat filtration, or Indian almond leaves is strongly recommended. It is a specialist species suitable only for very experienced keepers.

Piranha ownership is restricted in many jurisdictions; confirm legality before purchase.

Water: 25-29°C, pH 4.5-6.5, very soft water essential (0-6 dGH); blackwater conditions with tannins are non-negotiable for long-term health. Tank: Minimum 400L; densely decorated with driftwood roots; dim lighting replicates blackwater habitat; secure lid. Feeding: Carnivore; fish fillet, whole prawns, freeze-dried or frozen foods; adjust to individual preferences. Breeding: No captive breeding records. Compatibility: Solo housing only; its blackwater requirements make it a demanding specialist — confirm legal status before purchase.