PHOTOS: 100+ New Sharks, Rays Named in Australia

PHOTOS: 100+ New Sharks, Rays Named in Australia
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In northern Australia, a group of rare freshwater sharks stalk their prey through tropical rivers, including the speartooth shark Glyphis glyphis.

Many of the new fish identified during a recent shark-and-ray cataloging project grow slowly, putting them at greater risk of extinction, said Clive Roberts, curator of fishes at the Museum of New Zealand.

''They're long-lived and relatively slow reproducers, only dropping pups perhaps every second year,'' Roberts said.

''Because they are vulnerable to fishing, they become locally extinct fairly quickly.''

(Related: "8 Million Sharks Killed Accidentally off Africa Yearly" [April 17, 2007].)
—Photograph courtesy CSIRO
 
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