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The red-tailed black shark (Epalzeorhynchos bicolor; syn. Labeo bicolor), also known as the redtail shark, red tailed shark, and redtail sharkminnow, is a species of tropical freshwater fish in the carp family, Cyprinidae. It is named after its shark-like appearance and movement, as well as its distinctive red tail. [2]
As a result, the long-tailed or common thresher shark, Alopias vulpinus, is also known as the fox shark. [5] The common name is derived from a distinctive, thresher -like tail or caudal fin which can be as long as the body of the shark itself.
The tail of a shark consists of the caudal peduncle and the caudal fin, which provide the main source of thrust for the shark. Most sharks have heterocercal caudal fins, meaning that the backbone extends into the (usually longer) upper lobe. The shape of the caudal fin reflects the shark's lifestyle, and can be broadly divided into five categories:
A video shows a huge and vulnerable thresher shark washing up on a beach in Queens, New York, on Monday afternoon. Witness Zoe Berger took the 32-second video of the fish on the sand struggling to ...
The first dorsal fin is tall and positioned slightly closer to the pectoral fins than the pelvic fins. The pelvic fins are almost as large as the first dorsal fin and bear long, thin claspers in males. The second dorsal and anal fins are tiny, with the former positioned ahead of the latter.
According to biologists, the dorsal fin’s size in such shallow water should reveal part of the shark’s back or a second dorsal fin — neither of which are visible.
Growing to a maximum length of 4.3 m (14 ft), the slimmer build and long, broad pectoral fins of this shark suggest that it is a slower and less active swimmer than the shortfin mako. Longfin mako sharks are predators that feed on small schooling bony fishes and cephalopods. Whether this shark is capable of elevating its body temperature above ...
Researchers have discovered evidence pointing to the first known case of a porbeagle shark — which can grow up to 12 feet long and ... Tracking tags were placed on the dorsal fins of the sharks ...