A marine living fossil 450 million years old!...

Nice thanks.

A "Horseshoe Crab" I think that they are called, saw them on a TV show about both them and another living fossil the Chambered Nautilus. From memory a dish was prepared from one which was not particularly appetizing and involved the creature's eggs which are contained in the horseshoe shape around the head. Closest thing to a Trilobite which once was the dominant species in the oceans millions of years ago. Apparently their blue blood is used for testing of biological contamination in laboratories due to some unique properties which have enabled the species to survive the millennia without getting diseased by bacteria and pathogens.