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Whale shark mouths can contain over 300 rows of tiny teeth and 20 filter pads which it uses to filter feed. [18] The spiracles are located just behind the eyes. Whale sharks have five large pairs of gills. Their skin is dark grey with a white belly marked with an arrangement of pale grey or white spots and stripes that is unique to each individual.
Shark Anatomy (50693674756) The gill slits of a whale shark flaring as it expels water from its pharyngeal cavity. In the shark anatomy image, it depicts the beginning half of the shark, including the gills. The shark gills are especially important and were evolved from the chordate pharyngeal gill slits synapomorphy.
Sharks and rays typically have five pairs of gill slits that open directly to the outside of the body, though some more primitive sharks have six pairs with the Broadnose sevengill shark being the only cartilaginous fish exceeding this number. Adjacent slits are separated by a cartilaginous gill arch from which projects a cartilaginous gill ray.
Gill rakers, when long and closely set, play the same role in suspension-feeding fish such as herring, mullet, megamouth, basking and whale sharks, as baleen in the filter-feeding whales. [2] Gill rakers of an orange-spotted grouper, Epinephelus coioides
Larger species, like the whale shark, are able to conserve their body heat through sheer size when they dive to colder depths, and the scalloped hammerhead close its mouth and gills when they dives to depths of around 800 metres, holding its breath till it reach warmer waters again.
Such gills are characteristic of cartilaginous fish such as sharks and rays, as well as deep-branching vertebrates such as lampreys. In contrast, bony fishes have a single outer bony gill covering called an operculum. Most sharks and rays have five pairs of gill slits, but a few species have 6 or 7 pairs. Shark gill slits lie in a row behind ...
In 2018, there were only 66 confirmed unprovoked shark attacks on humans, which is the lowest it's been in years. It's even more rare for the attack to be fatal — last year, the U.S. experienced ...
Ram ventilation [11] is the process in which at higher speeds, the remora uses the force of the water moving past it to create movement of fluid in the gills. At lower speeds, the remora will use a form of active ventilation, [11] in which the fish actively moves fluid through its gills. In order to use active ventilation, a fish must actively ...