aplacental viviparity

The Cookiecutter shark (also known as the Cigar shark or Luminous shark) is a small rarely-seen shark which often glows green and grows up to 50 cm (20 in) long. It has been found at depths of about 6,000 m (3,300 ft) below the surface of the ocean. The Cookiecutter shark derived its name from its habit of removing small circular chunks of flesh from whales and large fish. It is hypothesized that the shark seizes its much larger prey with its jaws, t ...

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