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13 February 2019 / Phys.org / University of Miami

Ecosystem changes following loss of great white sharks

Seal Island, False Bay, South Africa

A new study has documented unexpected consequences following the decline of great white sharks from an area off South Africa. The study found that the disappearance of great whites has led to the emergence of sevengill sharks, a top predator from a different habitat. A living fossil, sevengill sharks closely resemble relatives from the Jurassic period, unique for having seven gills instead of the typical five in most other sharks.

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