common name (Horseshoe crab)

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More closely related to spiders and scorpions than other crustaceans.

and still going strong

Horseshoe crabs have been around from 450 million to 200 million years ago long before dinosaurs roamed the earth.

Where are they located...

Horseshoe crabs are found along the the coast of north America in the Atlantic Ocean from Maine to Mexico and in south east Asia.

What they look like

Horseshoe crabs have a long, thin, jagged edge tail that appears dangerous, but is used to flip the animal upright. They also have a shell that covers the tops of their body

Why are they important

Horseshoe crabs copper based blood is used to test for the sterility of medical equipment and some drugs for bacteria toxins. And they feed other organisms in their ecosystem.