Credit: Thomas P. Peschak/

A blacktip shark inspects a surfer paddling on a prototype surfboard fitted with a electronic shark deterrent (built into it’s underside). During this preliminary test the electronic shield was switched off
and the sharks approached closely (Tests were conducted under baited conditions off the KwaZulu Natal coast, South Africa). When a shark swims into a electrical field, it is thought that it’s ampullae of
Lorenzini (the organ that can detects weak electromagnetic fields) are overstimulated causing uncomfortable muscles spasm.

Credit: Thomas P. Peschak/ Save our Seas Foundation

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