Notopteridaefreshwater fishintermediate

African Knife Fish

Xenomystus nigri

Also known as: African Knife Fish, African Brown Knife Fish

Origin: Africa

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Water Parameters

Temperature2328 °C
15 °C35 °C
pH67.5
49
GH (Hardness)215 °dGH
0 °dGH30 °dGH
KH (Alkalinity)08 °dKH
0 °dKH20 °dKH

Quick Stats

Max Size
30 cm
Min Tank
120 L
Lifespan
5-8
Swimming Level
bottom-middle
Schooling
No
Diet
carnivore
Temperament
semi-aggressive toward conspecifics and knife fish; peaceful with other species

About

Xenomystus nigri is the only member of the subfamily Xenomystinae and is native to the Nile, Congo, and Niger river basins. It is far smaller than the Clown Knife Fish and considerably more peaceful, making it suitable for a large community aquarium with robust tankmates. Its plain dark body and undulating swimming motion make it a subtle but captivating addition to an African biotope.

Care Guide

Water: 23-28°C, pH 6.0-7.5, soft to moderately hard. Tank: Minimum 120L, dense plants or driftwood, dim lighting, hiding zones. Feeding: Carnivore; live and frozen bloodworm, Tubifex, small invertebrates; nocturnal feeder. Behaviour: Semi-aggressive toward conspecifics and similar-shaped fish; peaceful toward dissimilar species. Compatibility: Medium to large tetras, catfish, robust barbs; avoid other knife fish.

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