ECHENEIS, in ichthyology, a genus belonging to the order of thoracici. The head is fat, naked, depressed, and marked with a number of transverse ridges: it has ten rays in the branchiostegæ membrane; and the body is naked. There are two species, viz. 1. the remora, with a forked tail, and eighteen striae on the head. It is found in the Indian ocean. 2. The pœnates, with an undivided tail, and twenty-four striae on the head. It is likewise a native of the Indian ocean.