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Horseshoe Crab – 445 million years old
Horseshoe crabs were originated on Earth before 445 million years ago. They live in shallow ocean waters across the world. Horseshoe crabs have a hard exoskelton, long tail and spines. They have nine eyes in total, found throughout the body. Out of nine two large eyes are mainly used by horseshoe crabs and others are light receptors to control the movements. They also can sense ultra violet rays.
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