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Shark teeth are strong and made of enamel. Many sharks have 3 rows of teeth. These teeth are embedded in the gums, not the jaw. [10] Sharks are born with teeth that are constantly being replaced. Teeth are replaced every two weeks, approximately. [10] The shape of the teeth determine the diet of the shark.
Shark migration patterns may be even more complex than in birds, with many sharks covering entire ocean basins. Sharks can be highly social, remaining in large schools. Sometimes more than 100 scalloped hammerheads congregate around seamounts and islands, e.g., in the Gulf of California. [42] Cross-species social hierarchies exist.
The great white is an epipelagic fish, observed mostly in the presence of rich game, such as fur seals (Arctocephalus ssp.), sea lions, cetaceans, other sharks, and large bony fish species. In the open ocean, it has been recorded at depths as great as 1,200 m (3,900 ft). [10]
South Carolina State Park Service interpretive ranger Rachel Dunn shows an oyster shell that many people may think is a shark tooth on Thursday, March 14, 2024 at Hunting Island State Park.
Greenland sharks have also been found with remains of moose, polar bear, horse, and reindeer (in one case an entire reindeer body) in their stomachs. [13] [26] [22] The Greenland shark is known to be a scavenger and is attracted by the smell of rotting meat in the water. The sharks have frequently been observed gathering around fishing boats. [13]
IGN’s A.A. Dowd sums it up: “The bar for shark movies lies near the bottom of the ocean, so it’s no great victory that ‘Under Paris’ Gallic riff on ‘Jaws’ neatly clears it.”
Tiger sharks can be seen in the Gulf of Mexico, North American beaches, and parts of South America. It is also commonly observed in the Caribbean Sea. Other locations where tiger sharks are seen include off Africa, China, India, Australia, and Indonesia. [5] Certain tiger sharks have been recorded at depths just shy of 900 m (3,000 ft). [7]
The presence of only one lateral keel on the tail and the lack of lateral cusps on the teeth distinguish the mako from the closely related porbeagle sharks of the genus Lamna. [ citation needed ] The shortfin mako shark is also credited as being the fastest shark in the ocean, reaching moving speeds of 50 km/h (31 mph) with bursts up to 74 km/h ...