Petrotilapia ?hara? (Petrotilapia xanthos)

Biology

The absence of a dark submarginal band in the dorsal fin distinguishes P. xanthos from P. microgalana, P. genalutea, P. nigra, P. chrysos, P. mumboensis, and P. pyroscelos which have such a band. Adult males of P. xanthos are yellow, which distinguishes them from P. tridentiger, which are light blue with dark blue bars. Adult males of P. xanthos are also distinct from those of P. flaviventris, and P. palingnathos. Males of P. flaviventris are yellow on ventral and mid flank with scales outlined in blue; the dorsal one-third is blue to gray with yellow and orange highlights; cheeks and throat yellow to orange. Adult male (and female) P. palingnathos have distinctly retrognathous jaws and can thus be distinguished from those of P. xanthos. Females of P. xanthos are light brown, which distinguishes them from those of P. tridentiger, which are brown, from P. chrysos and P. microgalana, which are golden yellow, from those of P. flaviventris, which are yellow brown with interrupted black str

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