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Sharkbook is a global database for identifying and tracking sharks, particularly whale sharks, using uploaded photos and videos.In addition to identifying and tracking sharks, the site allows people to "adopt a shark" and get updates on specific animals.
The sandbar shark is one of the largest coastal sharks in the world, and is closely related to the dusky shark, the bignose shark, and the bull shark. Its dorsal fin is triangular and very high, and it has very long pectoral fins. Sandbar sharks usually have heavy-set bodies and rounded snouts that are shorter than the average shark's snout.
The tiger shark is the only species in its family that is ovoviviparous; its eggs hatch internally and the young are born live when fully developed. [7] Tiger Sharks are unique among all sharks in the fact that they employ embrytrophy to nourish their young inside the womb. The young gestate in sacks which are filled with a fluid that nourishes ...
[8] [5] Hatchlings are considered large for sharks, reaching over 14 cm in length by the time they leave the egg case. [5] Bullhead shark eggs typically hatch after 7 to 12 months, depending on the species. [5] The female Japanese bullhead shark has been known to deposit their eggs in one location along with other females, called a "nest". [5]
The Galapagos shark can be distinguished from the dusky shark in having taller first and second dorsal fins and larger teeth, and it can be distinguished from the grey reef shark in having a less robust body and less pointed first dorsal fin tip. However, these characters can be difficult to discern in the field.
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Bull sharks mate during late summer and early autumn, [10] often in bays and estuaries. [57] After gestating for 12 months, a bull shark may give birth to 1 to 13 live young. [10] [58] They are viviparous, born live and free-swimming. The young are about 70 cm (27.6 in) at birth.
New video obtained by TMZ and verified by NBC News captured the moment after a shark bit a 10-year-old Maryland boy who was on vacation in the Bahamas.