Common names: flounder (English), lenguado (Espanol)
Pseudorhombus binii Tortonese, 1955
Body oval, moderately deep, height 40% of SL; eyes on left side, close together, separated by a bony ridge; upper margin of head concave before eye; mouth reaches under center of pupil of lower eye; teeth in 1 row on jaws, similar on both jaws or a little larger and more spaced on lower jaw, well developed on both blind and eyed sides; 23 gill rakers; dorsal origin over front edge of pupil, 63 rays; anal 53 rays; pelvics with similar sized bases, symmetrically positioned on belly, eye-side fin above body midline; pectoral on eye side 12, 20% longer than blind side fin, all rays on blind side fin unbranched; tail fin rhomboidal; urinary papilla on eyed-side, anus on blind side; lateral line well developed on both sides, strongly arched over pectoral fin, a branch running from above opercular region to front of dorsal fin; scales rough on eye side, smooth on blind side, relatively small (108 on lateral line).
Eye-side brown with numerous diffuse dark spots on body and fins.
Size: known to 9.5 cm.
Habitat: benthic on soft bottoms.
Depth: 20-100 m?
Ecuador and Peru.