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Since they are such an old species, Horseshoe Crabs are actually considered to be “living fossils” that haven’t evolved much in the last millions of years. (Reference 3) A Horseshoe Crab does not just walk around on its legs, it uses its jointed body and tail so maneuver around and actually swims upside down. Speaking of their legs, Horseshoe Crabs have the ability to regrow limbs such as their legs or tail. A scary as they may look, they cant hurt humans unless a human were step on them. Since Horseshoe Crabs can live to over 20 years old, Horseshoe Crabs must molt six times within their first year of living growing 25-33% each time. Even after that year they will occasionally molt. Horseshoe Crabs are extremely interesting creatures that can teach valuable lessons in many fields such as medicine and