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The shark kidney excretes urea that is needed for the shark to have in its system so the shark does not become dehydrated from living in seawater. [14] Sharks hearts have two chambers. The shark heart's main importance is providing oxygenated blood to the entire body while filtering out the deoxygenated blood. [15]
A group of friends were deep-sea fishing when they suddenly found themselves in a scary situation: Sharks surrounded their boat.
A shocking video captured the moment fishermen off the coast of Louisiana were surrounded by hungry sharks. The video was captured by Dillon May, from Jacksonville, Florida, and posted on TikTok ...
A frenzied group of sharks surrounded a fishing charter off Florida and began taking turns attacking its trolling motor, video shows. It happened Monday, Feb. 26, about 20 miles east of Cape ...
Unlike bony fish, sharks do not have gas-filled swim bladders for buoyancy. Instead, sharks rely on a large liver filled with oil that contains squalene, and their cartilage, which is about half the normal density of bone. [51] Their liver constitutes up to 30% of their total body mass. [35]
Generally sharks have only one layer of tesserae, but the jaws of large specimens, such as the bull shark, tiger shark, and the great white shark, have two to three layers or more, depending on body size. The jaws of a large great white shark may have up to five layers. [29]
More than 84,000 marine animals have been ensnared by drum-lines and shark nets since the program began in 1962 [...] Nearly 27,000 marine mammals have been snared. The state’s shark control policy has captured over 5,000 turtles, 1,014 dolphins, nearly 700 dugongs and 120 whales, all of which are federally protected marine species. [46]
The shortfin mako shark (/ ˈ m ɑː k oʊ ˌ ˈ m eɪ-/; Māori: /ˈmaːko/; Isurus oxyrinchus), also known as the shortfin mako, blue pointer, or bonito shark, is a large mackerel shark. It is commonly referred to as the mako shark, as is the longfin mako shark (Isurus paucus). The fastest known shark species, able to reach speeds of 74 km/h ...