Most sharks have eight fins: a pair of pectoral fins, a pair of pelvic fins, two dorsal fins, an anal fin, and a caudal fin.The members of the order Hexanchiformes have only a single dorsal fin. The anal fin is absent in the orders Squaliformes, Squatiniformes, and Pristiophoriformes.Shark fins are supported by internal rays called ceratotrichia. Anal/cloacal fin The anal/cloacal fin is located on the ventral surface behind the anus/cloaca. This fin is used to stabilize the fish while swimming. Adipose fin Adipose fin of a trout: The adipose fin is a soft, fleshy fin found on the back behind the dorsal fin and just forward of the caudal fin.
Synonyms for anal at Thesaurus.com with free online thesaurus, antonyms, and definitions. Find descriptive alternatives for anal. Fin, Foramen magnum.; The anterior edge of the dorsal fin is furnished with a row of small rounded horny spines or, rather, tubercles, of variable number.; Smith Woodward has observed that the decline of many groups of fishes is heralded by the tendency to assume elongate and finally eel-shaped forms, as seen independently, for example, among the declining Acanthodians or palaeozoic sharks.
Oct 05, 2009 · Anal: Located on the fish's ventral side, further towards the tail than the pelvic fins. Stabilize movement and help in sharp turns. Caudal: a.k.a. the tail fin. Provides a powerful forward thrust to propel the fish through water.Status: Open. dorsal fin is often divided into two distinct portions: the first or spinous dorsal fin, which is closest to the head of the fish and often contains hard spines; and the second dorsal fin. Finlets – The series of small fins situated behind the dor-sal and anal fins on some species of fish. Forked Tail – A caudal fin marked by the extension.