Comprehensive DescriptionRead full entry
| Common names: sleeper (English), guavina (Espanol), dormilón (Espanol) |
Eleotris picta Kner, 1863
Elongate, stout body; head broad, depressed; small eyes; a distinct knob at front and rear angles of eye; snout short, blunt; gill membranes broadly joined to throat; a strong, forward-pointing spine embedded in the skin at the lower rear corner of the preopercle; mouth large, broad, very oblique, lower jaw strongly protruding; teeth small conical, in several rows on jaws; two separate dorsal fins, V-VI weak spines + I, 7-8, base of 2nd dorsal < distance from the end of that base to tail fin; pectoral fin 18; anal I, 7-8; pelvics I, 5, long, completely separated; tail base long; tail fin round; scales small, 60-68 along side, 21-26 rows between origin of 2nd dorsal and anal fin base, 33-40 rows around tail base, smooth at front, rough at rear; top of head, cheeks and opercle scaled; tiny scales between eyes; no lateral line.
Head, body and fins dark blackish to greenish brown, with a paler belly. Juveniles with the lower 2/3 of the head, body and tail fin dark blackish brown; the top of the head and back are cream.
Size: reaches 53 cm.
Habitat: adults of these fishes are largely restricted to freshwater; juveniles are often found in low salinity intertidal areas of river mouths.
Depth: 0-5 m.
Occurs from the mouth of the Gulf of California to northern Peru, as well as Cocos and the Galapagos.
Note: Eleotris tecta Bussing 1996, is a similar, uncommon species from freshwater on the mainland between Costa Rica and Colombia. It can be distinguished by having fewer pectoral rays than E picta (16-17 vs 18 for E picta), and smaller scales than E. picta (lateral scales 56-61 vs 60-68 in E picta; scales between 2nd dorsal and anal fins, 15-17 vs 21-26 rows in E picta; and scales around tail base 23-26 vs 33-40 rows in E picta).