Common names: mud-sucker (English), chupalodo (Espanol), gobio-chupalodo (Espanol)
Gillichthys seta (Ginsburg, 1938)
Moderately elongate, body compressed; head large (> 25% TL) broad, depressed, pointed; sensory papillae on head few and separated; narrow bony ridge over each eye; eyes small, far apart; jaws very long - lower extends ½ way to gill opening, upper to edge of preopercle in adult; preopercle covered with skin; teeth small, conical, 4-5 rows on each jaw; first dorsal fin low and rounded, VI (IV-VIII) + I, 10-11; anal fin with short base, I, 9-11; pectoral broad, rounded, small top ray free from fin for ~ ¼ its length; pelvics form disc, membrane between pelvic fin spines with large side lobes; tail rounded; scales small (~ 65 rows along side), imbedded, rough in juveniles, mainly smooth in adults; nape scaleless; skin covered with thick mucous.
Sides light brown, with alternating dark brown and pale yellow blotches; ~ 6 irregular diffuse black saddles on back; belly yellowish.
Size: 6 cm.
Habitat: rocky tide pools with fine sand bottoms.
Depth: 0-2 m.
Northern Gulf of California.