Video captured 20 tawny sharks writhing together in shallow water.
Twenty wriggling tawny sharks (Nebrius ferrugineus) were recently caught on video undulating on a beach on Mer Island, Australia.
But why were the sharks shimmying in the sand? Though the sharks were gathered in shallow water, they weren't stranded or in distress. Rather, their sinuous moves dug up tasty marine clams known as pipis (Paphies australis, the name "pipi" comes from the Māori language), which were buried in the wet sand.
Local resident Willam Bero filmed the scene and shared the footage on YouTube on Jan. 23. The sharks typically visit beaches on Mer Island beginning in September to perform this "dance" as they feast on the small clams, Bero told local news site Tropic Now.
Continued and video
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