Aquarist Atlas
Fish by water

Blackwater fish

Blackwater rivers run tea-coloured with dissolved organic matter and are very soft and acidic. These are the atlas fish whose habitat water is a blackwater river with cited chemistry.

332 species from 1 water

A fish is listed when the habitat water named on its own page is a blackwater river whose own sources describe it as one.

Rio Negro · 332 fish

Habitat water soft · 8–29 µS/cm Source: A contribution to the chemical characterization of rivers in the Rio Negro basin (Küchler et al., J. Braz. Chem. Soc.) — pH 3.9–6.1, conductivity 8.8–28.6 µS/cm, DOC.

Blackwater Estimating the Colored Dissolved Organic Matter in the Negro River (Remote Sensing 16(4):613, 2024): blackwater, pH 4–5, conductivity under 20 µS/cm

Other blackwater rivers join this list once their chemistry is cited in the atlas. A fish whose range spans waters of different character is left off.

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