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This is a fin stroke for maintaining position and attitude at the surface, particularly while waiting for a pickup or taking a compass bearing. The fins are sculled from side to side using opening and closing motions of the legs, and the ankles rotated as best suited to the thrust needed to turn or hold the diver steady.
Swimfins, swim fins, diving fins, or flippers are finlike accessories worn on the feet, legs or hands [1] and made from rubber, plastic, carbon fiber or combinations of these materials, to aid movement through the water in water sports activities such as swimming, bodyboarding, bodysurfing, float-tube fishing, kneeboarding, riverboarding, scuba diving, snorkeling, spearfishing, underwater ...
Bi-fins (also known by its acronym, BF or as 'stereo-fins') is swimming on the surface of the water with mask, snorkel and a pair of fins using a crawl style. BF races are held for distances of 50, 100, 200, 400 and 4 × 100 mix relays (2 men's, 2 women's) in swimming pools and over various long distances in the open water environment such as 4 ...
A pair of flippers will have you swimming like a fish in no time. Our expert shares what to look for and recommends options from Speedo, Cressi, Tusa, and more.
In anglerfish, the anterior of the dorsal fin is modified into a biological equivalent to a fishing pole and a lure known as an illicium or esca. Some fishes have adapted their dorsal fins to defend against predators with sharp erect spines and venom, as in many species of catfish, [1] the spiny dogfish, [2] and perhaps the Port Jackson shark, [3]
1962: On 15 October 1962, James S Christiansen files a patent for a device enabling a pair of swimming fins to be coupled together to reduce fatigue and cramping during prolonged swimming. Although the detachable coupling converting the separate swimming fins into a monofin-like design is granted US patent 3165764A [ 7 ] on 19 January 1965, it ...
The anal/cloacal fin is located on the ventral surface behind the anus/cloaca. The bones that support the anal fin are called pterygiophores. There are up to two series, a proximal series (axonosts) and a distal series (baseosts) Most fish use their anal fin to stabilize while swimming; Knifefish use their anal fins for thrust (gymnotiform ...
Marlins have elongated bodies, a spear-like snout or bill, and a long, rigid dorsal fin which extends forward to form a crest. Marlins are among the fastest marine swimmers. However, greatly exaggerated speeds are often claimed in popular literature, based on unreliable or outdated reports. [3]
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