Cataetyx alleni, sometimes called Allen's brotula, is a species of fish in the family Bythitidae (viviparous brotulas).
Cataetyx alleni is grey, with a maximum length of . It has 109âÂÂ111 dorsal finrays, 79âÂÂ83 anal finrays, and 31âÂÂ32 pectoral finrays.
Cataetyx alleni is bathydemersal, living at depths of in the Atlantic Ocean and Mediterranean Sea.
Cataetyx alleni reproduces viviparously. It feeds on polychaetes and benthic crustaceans.