Deep-water habitats deeper than 50 m, living and breeding in subdued
light conditions.
Typical adult size:
Maximum recorded standard length about 13 cm.
Special notes:
Placidochromis macrognathus belongs to group 4 of the deep-living
Placidochromis assemblage, defined by species with 8–10 gill rakers. It is distinguished
by a markedly strong lower jaw, giving it the appearance of a miniature
Tyrannochromis nigriventer. The deep-water Placidochromis form a distinct
assemblage characterized by vertical barring and considerable morphological
variation among species.
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