D1 12; D2 absent; P1 11; P2 9; A 13. Color uniform light grey, speckled with black, translucid when alive; fins dark. Body elongate, somewhat compressed and soft. Eyes very small, covered by adipose membrane; snout very short. Mouth very wide, armed with slender, recurved and depressible teeth of unequal size; palatine teeth also large and depressible; lower jaw longer than upper. A conspicuous adipose fin.