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The shape, size, position and colour of the dorsal fin varies with the type of billfish, and can be a simple way to identify a billfish species. For example, the white marlin has a dorsal fin with a curved front edge and is covered with black spots. [4] The huge dorsal fin, or sail, of the sailfish is kept retracted most of the time. Sailfish ...
Like many other sharks, blue sharks are countershaded: the top of the body is deep blue, lighter on the sides, and the underside is white. The male blue shark commonly grows to 1.82 to 2.82 m (6.0 to 9.3 ft) at maturity, whereas the larger females commonly grow to 2.2 to 3.3 m (7.2 to 10.8 ft) at maturity. [ 8 ]
Nearly every fin of a shark is targeted for harvest, as highlighted in the diagram. The primary and secondary dorsal fins are removed from the top of the shark, plus its pectoral fins, and, in a single cutting motion, the pelvic fin, anal fin, and bottom portion of its caudal fin, or tail.
Savannah Guthrie discussed the "shark sighting" on the Today Show Thursday. Over the past several months, viewers have submitted videos of what appears to be a giant shark fin popping out of the ...
Ground sharks are the largest order of sharks, and include a number of common types such as the blue shark, catsharks, swellsharks and sandbar sharks. Members of the orders are characterized by the presence of a nictitating membrane over the eye, two dorsal fins, an anal fin, and five gill slits.
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 ...
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
The second dorsal fin is similar to the first, although it is not as long. However, as some other Oxynotus species, the Caribbean roughshark does not have an anal fin. It has the typical shark coarse dermal denticles, but these are atypically large for the size of the shark. It contains small, circular spiracles at the dorsal base of its head ...
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