Horseshoe crabs are marine arthropods of the family Limulidae and order
Xiphosura or Xiphosurida, that live primarily in and around shallow ocean waters
Ancestors of horseshoe crabs date back over 450 million years--long before the
age of the dinosaurs.
Learn about the biology, range and behaviors of the horseshoe crab.
Sep 21, 2015 ... This makes it the world's oldest-known horseshoe crab. Four species are with us
today, all of which closely resemble their long-extinct ...
Oct 9, 2013 ... Rumors of an alien creature killed in Chelyabinsk Russia spread all over the
news. It was no alien but a horseshoe crab, a prehistoric living ...
Aug 22, 2013 ... Of course, horseshoe crabs aren't that expensive, but their blood is. One quart of
horseshoe crab blood costs around fifteen thousand dollars  ...
A comprehensive exploration of horseshoe crab natural history, anatomy and
conservation: contains research and educational material, plus collections of ...
Relatives. Horseshoe crabs are more closely related to spiders, ticks and
scorpions than they are to true crabs. Like other arthropods, they have a hard
The horseshoe crab (Limulus polyphemus) is a 'living fossil': forms almost
identical to this species were present during the Triassic period 230 million years
Atlantic Horseshoe Crab (Limulus polyphemus). Color: Shell is light tan to dark
brown. Legs and gills are dark reddish brown with white markings.