Xenomystax austrinus is an eel in the family Congridae (conger/garden eels). at www.fishbase.org. It was described by David G. Smith and Robert H. Kanazawa in 1989.Smith, D. G., 1989 [ref. 13285] [Various eel families] In: E. B. Böhlke (ed.) [ref. 13282]. Memoirs of the Sears Foundation of Marine Research Mem. 1 (part 9). It is a marine, deep water-dwelling eel which is known from the western central Atlantic Ocean. It is known to dwell at a depth range of .
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