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Oceanic
Whitetip Shark Carcharhinus
longimanus
| Photo modified from
Sharks and Rays. TC Tricas, K Deacon, P Last, JE McCosker, TI Walker, L
Taylor. 1997. Nature Company Guides, Time Life Book Series. Weldon Owen Pty Ltd
San Francisco. |
The oceanic whitetip shark
is a stocky and heavy set animal, up to 4 meters (13 feet) in length, with an
enlarged first dorsal fin and large paddle like pectoral fins. The tips of the
dorsal fins, caudal lobes and pectoral fins are mottled white on adults while
juveniles may also have black marks. However the amount of pigmentation on the
fin tips varies and is occasionally completely absent. The rest of the body is
dark gray or olive gray in colour. The upper teeth are broad and triangular
with serrated edges while the lower teeth have narrow serrated cusps and broad
bases.
Diet
This species of shark
feeds mainly upon fast moving fishes such as tuna, barracuda and white marlin.
However it also consumes squid, turtles, seabirds and even garbage that has
been disposed of at sea.
Reproduction
The oceanic whitetip shark
is viviparous with litters of 5 to 15 pups which are born at a length of 65 to
75 cm (26 to 30 inches). It is believed that litter size increases with the
size of the mother. Sexual maturity is reached at approximately 1.8 meters (5.8
feet).
Habitat
The oceanic whitetip shark
is generally found far from shore, from the surface down to a depth of 150
meters (500 feet). This pelagic species is found in water temperatures of 22
degrees Celsius or above. This shark is common in warm oceanic water and
occasionally found in coastal areas of the tropics or warm temperate
waters.
Range
This shark species is
found in the oceanic waters of the Atlantic, Pacific and Indian Oceans. In the
Atlantic it occurs from northeastern Georges Bank, south to the Caribbean Sea
and the Gulf of Mexico to Argentina. The specimens found in and around Canadian
waters are at the northern most point of their range.
Distinguishing
Characteristics
- White tipped fins
- Broad rounded first dorsal
fin
- Large paddle like pectoral
fins
- Nictitating membrane over eye
| Photo modified from
Sharks, History and Biology of the Lords of the Sea. A. Mojetta. 1997.
Swan Hill Press. |
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