Sharks play an essential rol in the health of our oceans


Plugged In: Shark Fetuses Detect Predators’ Electric Fields

Baby sharks still developing within leathery egg cases can sense the electric fields of predators and freeze in place to avoid detection, researchers say.

These findings could help in developing more effective shark repellents, scientists said.

A number of species of sharks deposit embryos in rectangular capsules once whimsically called mermaid’s purses or devil’s purses. These egg cases often possess long tendrils at each corner that help anchor them to surfaces.

Watch a shark egg with a little shark inside in the Monterrey Bay Aquarium:


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