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Dead shark spray keeps Jaws away

20 February 2013

New Scientist. Science news and long reads from expert journalists, covering developments in science, technology, health and the environment on the website and the magazine.

Smells like something’s died in here

(Image: James D. Watt/Imagequest3d.com)

JAWS? Meh. A chemical shark repellent – made from the rotten extract of their kin – can send the animals packing.

SharkDefense of New Jersey carried out a series of tests over five years that involved throwing open aerosol cans of the repellent into the water near feeding blacknose or Caribbean reef sharks off the coast of Bimini in the Bahamas. The sharks disappeared within a minute and stayed away for 10 minutes or more. Aerosols containing water, ethanol or other control substances had no effect (Ocean & Coastal Management, doi.org/kht).

“We repeated the test year after year,”…

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