It’s as easy as A, B, Sea: H for Horseshoe Crab


Horseshoe crabs are an arthropod more closely related to spiders and scorpions than crabs and lobsters. They have a three part body: prosoma (head), opisthosoma (heavy shell with legs under it) and the telson (tail). This amazing body structure has been unchanged for over 200 million years. Interestingly enough, this is this Beach Chair Scientist’s favorite animal and there have been numerous posts about Limulus polyphemus. Read more here.



  1. I’m not rating all of the a-z posts, but I have a soft spot for horseshoe crabs, too! We don’t have them over here on the Pacific side of the country, but I did get to see them on the Atlantic side once.

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