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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:
The adipose fin is a soft, fleshy fin found on the back behind the dorsal fin and just forward of the caudal fin. It is absent in many fish families, but found in nine of the 31 euteleostean orders ( Percopsiformes , Myctophiformes , Aulopiformes , Stomiiformes , Salmoniformes , Osmeriformes , Characiformes , Siluriformes and Argentiniformes ...
Caudal/Tail fins: Also called the tail fins, caudal fins are attached to the end of the caudal peduncle and used for propulsion. The caudal peduncle is the narrow part of the fish's body. The hypural joint is the joint between the caudal fin and the last of the vertebrae. The hypural is often fan-shaped.
The caudal fin has a strong lateral keel and a crescent shape. Other common names include bone shark, elephant shark, sailfish, and sunfish. In Orkney, it is called hoe-mother (contracted homer), meaning "the mother of the picked dogfish". [5] The basking shark is a cosmopolitan migratory species found in
E. naucrates is a medium-sized fish which can grow up to 110 cm (43 in) length. [ 9 ] Its body is elongated and streamlined, and its lower jaw is clearly prognathic (it projects forward well beyond the upper jaw). [ 3 ] The jaws, vomer and tongue have villiform teeth. [ 3 ] The main distinctive feature to distinguish from other fishes is the ...
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.
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Echeneis borboniensis Guichenot, 1863. Echeneis nubifera Tanaka, 1915. The common remora (Remora remora) is a pelagic marine fish [3] belonging to the family Echeneidae. The dorsal fin, which has 22 to 26 soft rays, acts as a suction cup, creating a vacuum [4] to allow the fish to attach to larger marine animals, such as whales, dolphins ...
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