Six-gill shark gray Chinese name
Latin Name hexanchus griseus bonnaterre
English name sixgill shark, grey shark, cow shark, brown shark
Chinese name of vertebrate door door
Latin gate of vertebrata
Chinese Gang Name cartilage Pisces
Latin Gang Name chondrichthyes
Chinese six-gill shark head Title
Latin Title hexanchiformes
Chinese Family Name Liusaishake
La Dingke name hexanchidae
Chinese is a generic name six gill shark
Latin genus name hexanchus
Distribution type the Pacific, Atlantic tropical and subtropical waters
Morphological characteristics of the body extended, thicker front of a large. Head wide and flat, about length of 1 / 5; the end of the base without concave depression on the bottom. Kiss short and blunt. Eyes large, oval, non-haw. Nostrils small, close to the snout. Mouth width, arc; fold less developed on the lower lip. Two Jaw teeth shaped; maxillary teeth without the middle, each side 20, in front of two simple and small sharp teeth, tooth head oblique, the middle 8-9 teeth, first lateral tooth with 1-3 small, low-end 7 tooth small round shape, with little or no head gear; jaw with a median tooth, the central head long and pointed teeth, side teeth the first 3, each side 12 teeth, 6 teeth in front of wide and flat rectangle, with 7-10 small teeth first, followed by 6 small teeth . Spiracle small, situated above the posterior margin of the eye. Gill opening 6. A dorsal fin, small and then place the top back-end point and pelvic fins, concave posterior margin, rounded corner, bottom corner tip protrusion; pectoral fins large, sickle-shaped, posterior margin concave, outer corner of blunt tip, obtuse angles; caudal fin long and narrow, Alice caudal axis slightly, the upper lobe seen in the end, the front of the next leaf shape highlight significant River Delta, in a notch between the rear. Dorsal dark brown or brown body, sometimes with a light lateral vertical section; kiss and abdomen ventrally light; the fins grayish brown; tail end of the lower lobe and dark gray.
Habits or habitat islands, the continental shelf near the outer edge of shelf slope, off the coast of benthic sharks, usually in the 180-1,100 m depth near the habitat, but the most up to 2,000 meters, a vertical distribution of day and night, daytime habitat of the underlying in the evening to the upper feed. Mainly to other small sharks class, small bony fish, crustaceans and squid for food. Ovoviviparous, the growth of the fetus in the mother's body up to 650 mm can give birth to a litter of about 22-108 tail pups, the pups from birth up to 60-70 cm in length. 2 meters in length of maturity.
Size :12-18 feet (3.7-5.5 m)
Range of habitats: tropical and temperate waters
Habitat depth :1,500-6, 000 feet (457.2-1,828.8 m)
Six-gill sharks are six gill shark head is a common deep-sea shark species, it is not to large sharks feed on plankton one. Its name comes from its six branchial cleft, like most sharks do not have five pairs; its other major feature is the dorsal fin located near the tail, and most other types of sharks are there in the middle of the back a prominent dorsal fin.
Six-gill shark is a large shark, can grow to 18 feet (5.5 meters), they have a shark does not have other effects, is to temporarily change the body color. Because of this shark to swim fast, they use this mix of skills and background, and then stalking the prey to swim fast.
Six-gill shark eat a variety of animals, including squid and other cephalopods, prawns, crabs and other crustaceans, a variety of fish and marine mammals, unless deliberately provoked, or often people without risk. They can dive to 6,000 feet (1,828.8 meters) to the surface at night to pursue prey to the eating of migratory marine shallow, it is also typical of migratory animals day and night.
Six-gill shark is ovoviviparous reproductive mode. Since most of the time they stay in deep sea, for the habits of this shark species known not by much. |
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