Common names: goby (English), gobio (Espanol)
Gobionellus daguae (Eigenmann, 1918)
Elongate, compressed; head a little compressed, snout broadly rounded; mouth opens at front, horizontal, ends under front edge of pupil; teeth on both jaws fine and numerous, 1-3 rows on top jaw (inner row may be strongly curved), 2-3 rows on bottom jaw, no large canines near front of bottom jaw; front nostril tubular; rear nostril a pit; large eyes, high on sides of head; between eyes narrow; preopercle canal with 3 pores; a single pore between eyes; 6-7 + 7-8 triangular gill rakers with flexible bases; dorsal fin VI, 1st 4 spines longest, filamentous, curved, reaching to base of 4th dorsal ray + I, 12-13; anal I, 12-13; pelvic I, 5 disk complete; tail fin long and pointed; scales rough on body, absent on head, nape and chest, 28-35 large scales in lateral series.
Olive; back with dark mottling; a row of short bars or elongate blotches along mid-flank, alternate ones smaller, last at base of tail; nape with 2 narrow cross bars; narrow dark stripe from mouth to edge of opercle; oblique bar under eye; pectoral translucent with large black spot on upper base; tail and soft dorsal with small black spots, forming bars; spinous dorsal with black rear margin; anal and pectoral light; pelvics dusky.
Size: 13.5 cm.
Habitat: brackish water in estuaries.
Depth: 0-5 m.
Eastern Panama and Colombia.