The science of sharks

Helix @ CSIRO

Following a fatal attack off New South Wales, sharks are once again in the spotlight. As tragic as these events are, shark attacks are so rare, scientists aren’t sure why humans are bitten at all.

Sharks are found in oceans all around the world – some live near the coast, others in deeper water. Some can even live in freshwater. There are more than 400 species, ranging in size from 17 centimetres to more than 12 metres. Many species are apex predators, and play an important role in marine ecosystems by managing fish populations.

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