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Whale sharks have unique spot patterning on their sides, similar to a human fingerprint, which allows for individual identification. Scuba divers around the world can photograph sharks and upload their identification photographs to the Sharkbook website, supporting global research and conservation efforts.
This torpedo-like shark can be spotted around 10 miles off the southwest coast of England in summer months. They can grow up to 12ft (3.8m) long and are known to give birth to as many as 50 live ...
Greenland sharks are estimated to reach sexual maturity at around 150 years of age at which point females measure around 4.19 ± 0.04 meters and males measure around 2.84 ± 0.06 meters. [ 10 ] [ 42 ] [ 43 ] One Greenland shark was tagged off the coast of Greenland in 1936 and recaptured in 1952.
Shark skeletons are very different from those of bony fish and terrestrial vertebrates. Sharks and other cartilaginous fish (skates and rays) have skeletons made of cartilage and connective tissue. Cartilage is flexible and durable, yet is about half the normal density of bone. This reduces the skeleton's weight, saving energy. [29]
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The bull shark (Carcharhinus leucas), can swim between salt and fresh water, and are found in tropical rivers around the world. Some prehistoric sharks (in a broad sense), including hybodonts and xenacanths , are also thought to have inhabited freshwater environments.
English: The size and growth of the whale shark (Rhincodon typus), represented by various individuals reported in the literature.A small 55 centimetres (22 in) pup, a 5.62 metres (18.4 ft) juvenile, a generic 9 metres (30 ft) young adult, a large 12.1 metres (40 ft) adult, and an exceptionally large adult with a precaudal length of 15 metres (49 ft).
This dive was directly responsible for the upsurge in shark tourism – especially free-diving (i.e. out of cage) swimming with big sharks. When operators around the world became aware that the great white was quite approachable and not likely to attack they considered whether the other sharks with bad reputations like tigers, bulls and ...