Horseshoe crabs are really very interesting. This limulus amoebocyte lysate test only emphasizes the amount of wonder these creatures induce.
Horseshoe crabs look almost alien, but are in fact related to the arachnid family along with spiders and scorpions.
There are fossils of this creature that are 450 million years old. Many scientists label them a living fossil.
Sadly, their numbers are dwindling. The natural habitat they live in is in great decline. This combined with their overharvesting is causing them to disappear rapidly.
There is a lot we can still learn from this ancient species.