Shorefishes of the Greater Caribbean online information system

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Genus: Oxynotus, Rough Sharks, Shark-rough


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body high, triangular cross-section
2 high, pointed, curved Ds with a spine
mouth small, transverse, under eye
no A

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OXYNOTUS

ROUGH SHARKS

Body strongly compressed, very high, with a triangular cross–section; abdomen with strong lateral ridges; head moderately broad and somewhat flattened; snout flattened;  spiracles large to enormous, close behind eyes; five gill slits; mouth nearly transverse and very short and small, with thick, papillose lips; labial furrows elongated, entirely encircling mouth, and under posterior halves of eyes, elongated posteriorly into postoral grooves; upper & lower teeth different, upper teeth much smaller, with single narrow erect smooth cusp; lower teeth highly compressed, serrated, broad and blade-like; skin denticles large, on stalks, with flattened,  trident–like cusps, surface of skin extremely rough; dorsal fins very large, broad, angular, high, sail–like and often falcate, with strong stout spines nearly completely buried in the fins and with ungrooved exposed tips; 2nd dorsal smaller than first;  pectoral fins high, pointed;  pelvic fins smaller than pectoral fins and dorsal fins; anal fin absent; tail fin with ventral lobe weakly developed in adults, and with subterminal notch strong.

An Atlantic and Pacific genus with five species, one in the Greater Caribbean.