Xenomystax
Xenomystax is a genus of eels in the family Congridae. It currently contains the following species:Xenomystax atrarius C. H. Gilbert, 1891 Xenomystax austrinus D. G. Smith & Kanazawa, 1989Xenomystax bidentatus Xenomystax congroides D. G. Smith & Kanazawa, 1989 Xenomystax trucidans Alcock, 1894