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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 ...
Cavitation is usually divided into two classes of behavior. Inertial (or transient) cavitation is the process in which a void or bubble in a liquid rapidly collapses, producing a shock wave. It occurs in nature in the strikes of mantis shrimp and pistol shrimp, as well as in the vascular tissues of plants.
Dolphin kick can also be used with paired fins (bifins), but does not reach the same level of efficiency. Nevertheless, it is a powerful technique and capable of producing high thrust, but this high thrust has a high energy cost when applied by sub-optimal fins and to high-drag scuba diving equipment, so it is often only used for short bursts ...
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The vortex created by the tubercle delays flow separation toward the trailing edge of the wing, thus reducing the effects of drag. However, in water, due to the crest/trough structure, cavitation is possible, and is undesirable. Cavitation occurs in areas of high flow velocity and low pressure, such as the trough of a tubercled structure.
The film follows former-dolphin-trainer-turned-activist Ric O'Barry's quest to document the dolphin hunting operations in Taiji, Wakayama, Japan.In the 1960s, O'Barry helped capture and train the five wild dolphins who shared the role of "Flipper" in the hit television series of the same name.
Encounter between a solitary wild dolphin and human children in 1967. Educational anthropologist Dr. Betsy Smith of Florida International University is usually credited with starting the first line of research into dolphin-assisted therapy in 1971, building on earlier research by American neuroscientist Dr. John Lilly on interspecies communication between dolphins and humans in the 1950s. [11]
The dorsal fin is sickle-shaped; and flippers are narrow, short, and pointed, with a distinctive bulge on the leading edge of the flipper (the side closest to the head). False killer whales are large marine predators. They are the fourth-largest extant species of oceanic dolphin, exceeded in size only by the orca, and the two species of pilot ...