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Spiracle of a bluespotted ribbontail ray, Taeniura lymma. Spiracles (/ ˈ s p ɪr ə k əl, ˈ s p aɪ-/ [1] [2]) are openings on the surface of some animals, which usually lead to respiratory systems. Spiracle of a shark (bighead spurdog, Squalus bucephalus) The spiracle is a small hole behind each eye that opens to the mouth in some fish.
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.
The velvet belly is a robustly built shark with a moderately long, broad, flattened snout. The mouth has thin, smooth lips. The upper teeth are small, with a narrow central cusp and usually fewer than three pairs of lateral cusplets. The lower teeth are much larger, with a strongly slanted, blade-like cusp at the top and interlocking bases.
Thunder Blade [a] is a third-person shoot 'em up video game released by Sega for arcades in 1987. [ 10 ] [ 1 ] Players control a helicopter to destroy enemy vehicles. The game was released as a stand-up arcade cabinet with force feedback , as the joystick vibrates.
Spiracles are reduced or missing in active pelagic sharks. [28] While the shark is moving, water passes through the mouth and over the gills in a process known as "ram ventilation". While at rest, most sharks pump water over their gills to ensure a constant supply of oxygenated water.
The shark exhibited partial pigmentation reduction, resulting in a pale appearance with white-greyish patches. Classified as leucistic, this case represents the first documented instance of leucism in the species and the first color disorder reported in the family Oxynotidae. Despite its atypical appearance, the shark's physical health appeared ...
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The cookiecutter shark exhibits a number of specializations to its mouth and pharynx for its parasitic lifestyle. The shark first secures itself to the body surface of its prey by closing its spiracles and retracting its basihyal to create pressure lower than that of the surroundings; its suctorial lips ensure a tight seal.