Beware of Flesh-eating Sand Piranhas at the Beach | KQED
Briefly

Excirolana chiltoni, known as sand piranhas, are aggressive tiny crustaceans that feed on both dead marine animals and occasionally beachgoers, demonstrating a keen adaptability.
These crustaceans live in shallow coastal waters and have evolved tools and strategies for feeding, making them highly efficient scavengers in their environment.
Their bite feels like a razor nick, and when grouped together, they can quickly cause significant damage, which emphasizes their predatory nature despite their small size.
Living within a small swath of the swash zone, sand piranhas are well-camouflaged and often overlooked, yet play a crucial role in the coastal ecosystem.
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