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The tail of a shark consists of the caudal peduncle and the caudal fin, which provide the main source of thrust for the shark. Most sharks have heterocercal caudal fins, meaning that the backbone extends into the (usually longer) upper lobe. The shape of the caudal fin reflects the shark's lifestyle, and can be broadly divided into five categories:
Squalidae. Squalidae, more commonly known as dogfish, dog sharks, or spiny dogfish, [3] are one of several families of sharks categorized under Squaliformes, making it the second largest order of sharks, numbering 119 species across 7 families. [4] Having earned their name after a group of fishermen reportedly observed the species chasing down ...
The bighead spurdog is a robustly built, spindle-shaped shark with a hump behind the head. The head is notably broad, and the snout is short and triangular with a blunt tip. The nostrils are preceded by a forked flap of skin. The medium-sized eyes are oval in shape and have a notch in the outside corner; behind them are small, crescent-shaped ...
Common thresher. The common thresher (Alopias vulpinus), also known as Atlantic thresher, is the largest species of thresher shark, family Alopiidae, reaching some 6 m (20 ft) in length. About half of its length consists of the elongated upper lobe of its caudal fin. With a streamlined body, short pointed snout, and modestly sized eyes, the ...
The video starts with four adorable German Shepherd puppies 'attacking' a woman as she tries to run away from them. The four are running after her, barking and trying to catch her.
A small species usually under 1 m (3.3 ft) long, the epaulette shark has a slender body with a short head and broad, paddle-shaped paired fins. The caudal peduncle (to which the tail fin is attached) comprises over half the shark's length. Adults are light brown above, with scattered darker spots and indistinct saddles.
Scymnus unicolor Müller & Henle, 1839. Squalus fulgens Bennett, 1840. The cookiecutter shark (Isistius brasiliensis), also called the cigar shark, is a species of small squaliform shark in the family Dalatiidae. This shark lives in warm, oceanic waters worldwide, particularly near islands, and has been recorded as deep as 3.7 km (2.3 mi).
Most of the demand comes from Europe, though the United States and Japan also import this species. The fins are shipped to East Asia for use in shark fin soup. The remainder of the shark may also be used for production of leather, liver oil, and fishmeal. International trade in the porbeagle appears to be significant, but remains unquantified ...
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