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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 ...
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.
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 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 ...
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 ]
The Florida Fish and Wildlife Conservation Commission examined the videos and determined it was nothing to be concerned about. ... should reveal part of the shark’s back or a second dorsal fin ...
Lantern sharks are deepwater fish with light-producing photophores on their bodies. The members of this family are small, under 90 cm (35 in) long, and are found worldwide. [13] Oxynotidae: Rough sharks: 1 5 Rough sharks are characterised by two large dorsal fins, each with a sharp spine, and with the first fin placed far forward above the head.
Packed full of color, character, and intrigue, these easy-to-look-after under-the-water creatures still require all the basic usual fish care — like the best fish food, a strict cleaning ...