horse shoe crab

Lazily sipping my ice lemon tea from the dining area, I saw this guy, very still for a long time... I almost felt tears imagining that he might be actually DEAD... I cannot take any more of these "anthropogenic" stuffs... Or are they immobile for a longtime ??? I actually do not know the species, but then it must be Limulus spp. right ?, I will post what i know about these guys in my other blog :-)