Species: Monolene dubiosa, Acapulco flounder, Asaedae flounder, Dark flounder

Monolene dubiosa Garman, 1899

Acapulco flounder, Asaedae flounder, Dark flounder

Body elongate (depth 39-44% of SL), tapering to tail; snout very short (< eye); eyes on left side of head, close together, with a spineless crest between them; lower eye originates slightly before top eye; mouth short, ends ~ front edge lower eye; teeth ~ equally developed on jaws on both eye- and blind-sides; 75-85 dorsal rays; 56-64 anal rays; pectoral short, ~½ length of head, 10-12 rays, no pectoral on blind side in adults; base of eye-side pelvic slightly longer than base of blind-side fin, with origin behind lower eye; lateral line arched over pectoral fin; 67-83 lateral line scales.