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Posts Tagged ‘Endangered Sevengill Shark

Above the Sharpnose sevengill shark

1. The sharpnose sevengill shark is uncommon but widely distributed in the tropical and temperate regions of all oceans except for the northeastern Pacific Ocean. This species usually captured at a depth of 300–600 m (980–2,000 ft) or down to 1,000 m (3,300 ft). But is occasionally found close to the surface but they many have been mistaking with another shark.  It is mainly found on the outer continental shelf and upper continental slope and may aggregate around seamounts.

2. Usually measuring 60–120 cm (2.0–3.9 ft) long. Sharpnose sevengill sharks attain a maximum length of 1.4 m (4.6 ft).

3. The sharpnose sevengill shark is ovoviviparous which mean they give birth to live young with no apparent reproductive season. The females give birth to litters of 9-20 pups the newborns measure about 26 cm (10 in) long. Males mature at 75–85 cm (2.46–2.79 ft) long and females at 90–100 cm (3.0–3.3 ft).

4. Small to moderate numbers of sharpnose sevengill sharks are captured as by catch in certain deep-water commercial fisheries on longlines or in trawls.They are utilized for fish-meal and liver oil the meat is said to be of good quality but reported to be mildly poisonous. When captured it is very active and quick to bite but it does not poses a threat to people due to its small size. There is some concern that populations of this slow-reproducing species may be declining in areas of sustained deep-water fishing and it has been assessed as Near Threatened by the World Conservation Union. It has occasionally been kept in captivity in Japan.

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