Xenochromis hecqui is a species of cichlid endemic to Lake Tanganyika in East Africa. It is mainly found at depths of , but has been recorded somewhat deeper, even in waters virtually devoid of oxygen.Lowe-McConnell, R.H. (1987). Ecological Studies in Tropical Fish Communities. . This species is a scale eater, consuming the scales off of other fishes, but will also feed on copepods. It can reach a total length of up to . Currently it is the only known member of its genus.
Its specific name honours the Belgian Lieutenant Célestin Hecq (1859–1910), a member of the Belgian colonial forces fighting the slave trade who collected the type of this species.
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