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BULL SHARK
(Carcharhinus leucas) Recognition: The bull shark has an extremely short snout much shorter than the width of the mouth. a first dorsal fin with pointed apex, and second dorsal fin much smaller than the first. It lacks an interdorsal ridge. The upper teeth have broadly triangular, heavily serrated cusps, the lower teeth have narrow triangular, finely serrated cusps. Color: Color is pale to dark gray above and white below. Newborn and very small juveniles. Size: Average size is about 230cm (7.5 ft) but it is said to grow to 350cm (11.5 ft). Similar species: The oceanic whitetip has a similar snout and teeth, but the tips of its first dorsal and pectoral fins are broadly rounded. The lemon shark has a second dorsal fin that is almost as large as the first Biology: The bull shark is cosmopolitan in warm waters. In North America it ranges from New York to Florida and the Gulf of Mexico. It is a common shallow-water species found in estuaries, harbors, and creeks. It often enters fresh water, sometimes penetrating hundreds of miles upstream. Economic importance: The species is important in coastal shark fisheries in the Gulf of Mexico. Fishing: It is mainly caught in coastal longlines. Carcass: Any very large, unmarked, brownish gray carcass lacking an interdorsal ridge, coming from coastal fisheries, is likely to be a bull shark. The fins from large specimens have denticles that are large enough to be seen with the naked eye. Any large shark caught in fresh water is most likely a bull shark. The blacknose shark has a greenish tinge. References |
Last updated: November 8, 1998
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