Comprehensive DescriptionRead full entry
| Common names: longfin-herring (English), arenquilla (Espanol) |
Opisthopterus macrops (Günther, 1867)
Elongate, strongly compressed; top of head a little concave; eye large; mouth opens obliquely up; forehead horizontal; lower jaw projecting at front, short (ends under eye); a distinct space between 2 bones of top jaw; jaw teeth small; 19-20 lower gill rakers; dorsal fin small, 11, origin about midway between tail fin base and pectoral base; anal fin long, ~ 60 rays, origin nearer tip of snout than base of tail fin; pelvic fins absent; belly with a sharp keel of ~ 29 large spiny scales (scutes); ~ 45-60 lateral scales.
Silvery; a dark blotch behind upper corner of operculum; fins yellowish.
Size: 21 cm.
Habitat: marine, coastal.
Depth: 0-10 m?
El Salvador to Panama.