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  2. Dorsal fin - Wikipedia

    en.wikipedia.org/wiki/Dorsal_fin

    Dorsal fin of a shark. A dorsal fin is a fin located on the back of most marine and freshwater vertebrates within various taxa of the animal kingdom.Many species of animals possessing dorsal fins are not particularly closely related to each other, though through convergent evolution they have independently evolved external superficial fish-like body plans adapted to their marine environments ...

  3. Fish fin - Wikipedia

    en.wikipedia.org/wiki/Fish_fin

    Dorsal fin of a chub (Squalius cephalus) The dorsal fins are located on the back. A fish can have up to three dorsal fins. The dorsal fins serve to protect the fish against rolling, and assist it in sudden turns and stops. In anglerfish, the anterior of the dorsal fin is modified into an illicium and esca, a biological equivalent to a fishing ...

  4. Fish anatomy - Wikipedia

    en.wikipedia.org/wiki/Fish_anatomy

    Dorsal fins: Located on the back of the fish, dorsal fins serve to prevent the fish from rolling and assist in sudden turns and stops. Most fishes have one dorsal fin, but some fishes have two or three. In anglerfish, the anterior of the dorsal fin is modified into an illicium and esca, a biological equivalent to a fishing rod and lure.

  5. Shark anatomy - Wikipedia

    en.wikipedia.org/wiki/Shark_anatomy

    Fins allow the sharks to be able to guide and lift themselves. 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. Pectoral fins are stiff, which enables downward movement, lift, and guidance. The members of the order Hexanchiformes have only a single

  6. Sail (anatomy) - Wikipedia

    en.wikipedia.org/wiki/Sail_(anatomy)

    The term sail or dorsal sail has been used to refer to sail-like structures on the back of various animals. Such animals can also be referred to as sail-backed or fin-backed. Such structures include the following: Neural spine sail – formed by the neural spines of the vertebrae; Dorsal fin – in some aquatic species with tall fins on their back.

  7. Moray eel - Wikipedia

    en.wikipedia.org/wiki/Moray_eel

    These genera are in two sub-families, Muraeninae and Uropterygiinae, which are distinguished by the location of their fins. [27] In Muraeninae the dorsal fin is near the gill slits and runs down the back of the eel, and the anal fin is behind the anus. [27] In the Uropterygiinnae, both the dorsal and the anal fin are at the end of the tail. [27]

  8. Sailfish - Wikipedia

    en.wikipedia.org/wiki/Sailfish

    The bill movement of sailfish during attacks on fish is usually either to the left or to the right side. Identification of individual sailfish based on the shape of their dorsal fins identified individual preferences for hitting to the right or left side. The strength of this side preference was positively correlated with capture success. [19]

  9. Oarfish - Wikipedia

    en.wikipedia.org/wiki/Oarfish

    The dorsal fin originates from above the (relatively large) eyes and runs the entire length of the fish. Of the approximately 400 dorsal fin rays, the first 10 to 13 are elongated to varying degrees, forming a trailing crest embellished with reddish spots and flaps of skin at the ray tips.