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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.
These sharks filter feed on prey by opening their mouths to let tiny organisms get sucked into their mouths to feed without using their teeth at all, instead filtering the food when passing water through their gills. [11] Basking sharks feed by swimming towards their prey with their mouth open and straining their food. [12]
Many sharks can contract and dilate their pupils, like humans, something no teleost fish can do. Sharks have eyelids, but they do not blink because the surrounding water cleans their eyes. To protect their eyes some species have nictitating membranes. This membrane covers the eyes while hunting and when the shark is being attacked.
The following outline is provided as an overview of and topical guide to sharks: Sharks (superorder Selachimorpha) are a type of fish with a full cartilaginous skeleton and a highly streamlined body. The earliest known sharks date from more than 440 million years ago, before the time of the dinosaurs. [1]
This is an accepted version of this page This is the latest accepted revision, reviewed on 22 December 2024. Family of sharks Hammerhead sharks Temporal range: Early Miocene – recent PreꞒ Ꞓ O S D C P T J K Pg N Scalloped hammerhead Scientific classification Domain: Eukaryota Kingdom: Animalia Phylum: Chordata Class: Chondrichthyes Subclass: Elasmobranchii Order: Carcharhiniformes ...
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. [26] [27] [28] 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. [26]
These "Sharks" invest their own money in these companies -- but how did the Sharks themselves get so rich? See: 6 ‘Shark Tank’ Products We Can’t Live Without Read: 10 Popular Products That ...