Comprehensive DescriptionRead full entry
| Common names: thread-herring (English), sardina (Espanol), machuelo-hebra (Espanol), sardina-gallera (Espanol) |
Opisthonema bulleri (Regan, 1904)
Slender thread herring, Pacific thread-herring
Body relatively slender, its depth ~ 31% of SL; mouth opens at front, oblique, short, without a notch at top front; top jaw with 2 toothed bones; teeth small, conical; 25-36 lower gill rakers; rear of gill opening on body with 2 fleshy lobes; dorsal at about midpoint of body, last ray long and filamentous, but not reaching tail fin; anal fin with base shorter than head, origin well behind dorsal fin; pectoral short, not reaching under dorsal fin; 7 branched pelvic rays; belly with keel of scutes before and behind pelvics; scales relatively small (< 50 in lateral series), irregularly arranged.
Back grey-green; sides silvery white; a black spot immediately behind upper edge of operculum followed by a yellow stripe along upper flank; 1-2 dark spots on top of back under dorsal fin; inner halves of dorsal and tail fins pale yellow, outer halves clear, tail tips may be dusky.
Size: 24 cm.
Habitat: coastal pelagic.
Depth: 0-10 m?
The eastern Gulf of California to Peru.