Comprehensive DescriptionRead full entry
| Common names: shark (English), tiburón (Espanol), cazón (Espanol) |
Rhizoprionodon longurio (Jordan & Gilbert, 1882)
Pacific sharpnose shark
Body slender; long pointed snout (as long as width of mouth); large round eyes; small, widely spaced nostrils; with long, prominent furrow over rear of top lip; no spiracle; large round eyes; front teeth on both jaws, with narrow, oblique points, may be serrated; five gill slits, last two over pectoral; two dorsal fins, first much larger, with origin ~ over rear margin of pectoral; second dorsal origin ~ over rear insertion of anal, fin slightly smaller than anal fin; no or rudimentary ridge between dorsals; pectorals broad, triangular; each anal fin with a long, conspicuous ridge before it; tail base with a crescentic transverse pit on top, another pit under bottom; tail fin strongly asymmetrical, with large lower lobe, top lobe notched under tip.
Grey or grey brown on back and sides, white below; rear edge and upper tip of tail fin broadly black.
Maximum size to at least 110 cm, possibly 154 cm; size at birth 33-34 cm.
A relatively common inshore shark often living in shallow estuarine waters.
Depth: 0-100 m depth.
Southern California to the Gulf of California and to Peru; the Revillagigedos, Cocos.