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The pectoral fin of the megamouth shark was studied, along with its skeletal and muscular system, to show its phylogenetic relationship to the other two sharks. [5] Worldwide sightings of the megamouth shark as of 2012. As of 5 March 2018, only 99 megamouth specimens had been caught or
The teeth are gigantic. The fifth gill opening is in front of the pectoral fin and spiracles are sometimes absent. They are heavily built sharks, sometimes weighing nearly twice as much as sharks of comparable length from other families. Many in the family are among the fastest-swimming fish. Megachasmidae: Megamouth sharks: 1 1
The pectoral fins are as long or longer than the head, with a nearly straight front margin and broad tips. The first dorsal fin is large with a rounded apex, and is placed behind the pectoral fins. The second dorsal and anal fins are tiny. The caudal peduncle is expanded laterally into strong keels.
This list of megamouth shark specimens and sightings includes recorded human encounters with Megachasma pelagios, popularly known as the megamouth shark. A similar list is published by the Ichthyology Department of the Florida Museum of Natural History at the University of Florida .
A deep-water megamouth shark was captured near Shizuoka, Japan. Looking at its mouth, we have to say it was named quite appropriately. The shark measured 13 feet long and weighed nearly 1,500 pounds.
The longfin mako shark very much resembles the shortfin mako shark, but has larger pectoral fins, dark rather than pale coloration around the mouth and larger eyes. The presence of only one lateral keel on the tail and the lack of lateral cusps on the teeth distinguish the mako from the closely related porbeagle sharks of the genus Lamna .
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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