Black Angelfish (Pterophyllum scalare)

Black Angelfish are a melanistic strain of Pterophyllum scalare — pigment cells pushed toward full black expression, producing a fish with a genuinely deep, dark body that reads as velvety under aquarium light. There are degrees of "black" in angelfish breeding: a true genetic black is uniformly dark with minimal pattern; a dark marble or smoky variety looks almost black but shows structure through the coloring. These fish span that range, and the exact expression varies between individuals even from the same spawn.

In a planted tank with a dark substrate and background, an all-black angelfish uses the visual environment brilliantly — visible primarily through movement, which is exactly how the lateral body compression evolved to work in submerged Amazonian root systems. In a bright bare setup, it reads very differently, standing out starkly without vegetation to give it context.

They're peaceable community fish when young and more territorial once paired off, which typically happens somewhere between 6 and 12 months. A bonded pair will clean a smooth surface and guard the spawning site with real cichlid intensity — other fish in the tank, including former tankmates, will be actively driven off. Give them enough space for multiple pairs (55+ gallons) to avoid constant territorial disputes.

Scientific name: Pterophyllum scalare (melanistic/dark strain)
Origin: Amazon River basin, South America
Water parameters: Temp 76–86°F · pH 6.0–7.5 · Soft to moderately hard water
Tank requirements: 30 gal minimum; tall tank preferred
Diet: Omnivore — flake, pellet, and frozen meaty foods
Compatibility: Peaceful community when young; territorial when spawning; avoid fin-nippers
Husbandry note: True black coloration intensifies with high-quality nutrition and good water conditions — thin, washed-out black usually points to a diet problem or suboptimal water quality. Dark substrate and slightly lower lighting shows the coloring at its best.