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BiologyVery little is known about this shark's social and mating behaviour, but they are thought to be solitary, coming together only to mate. Males are believed to nip a female's fins to entice her into mating (2). Reproduction in this shark is ovoviviparous; the young hatch from eggs retained within the mother so that she then gives birth to live young (2) (3). The exact gestation period is unknown, but it is thought to be longer than two years. Each litter can number from 22 to 108 pups and this incredibly large litter size suggests that juvenile mortality rates are high (2). Age determination is difficult in this species but males are believed to mature at 11 to 14 years, females at 18 to 35 years, and longevity to reach 80 years for both sexes (3). The bluntnose six-gill shark is a skilled predator and may also scavenge, feeding nocturnally on a wide variety of marine organisms including other sharks, rays, bony fishes, squid, crabs, and seals (1) (2). Although reported as being sluggish in nature, they can reach remarkable speeds when chasing prey (2).