Species: Symphurus williamsi, William's tonguefish, Yellow tonguefish

Symphurus williamsi Jordan & Culver in Jordan, 1895

Yellow tonguefish, William's tonguefish

Body highly compressed, elongate, oval, tapers to pointed tail; eyes small close-set, on left side, pupils with small covers; snout rounded; mouth small, curved, strongly so on blind side; margin of preoperculum concealed by skin and scales; dorsal origin ~ above upper eye; dorsal rays 89-95; anal rays 73-79;  dorsal and anal fins confluent with the pointed tail fin; only left pelvic fin present, 4 rays, on body midline, joined to anal fin by delicate membrane; pectoral fins absent, represented by a fine membrane; tail with 12 rays; no lateral line; scales rough, on both sides of body; rays of dorsal and anal on blind side covered with rough scales; scales in longitudinal series 86-96.