ok red crabs are easy to care for, they need brackish water of about 1.004. the water neednt be deeper than a few inches, what size is the tank. for red crabs 1 crab per 5g is the max. oh and yes they do need somewhere to haul themselves out of. if they dont they will die. they eat anything, pellets, chopped prawns, deshelled peas, and bloodworms. they can be handled but only do it if neccesery (sp?) its stressfull and you could accidentally damage them. they need some form of cave aswell.
if you need anymore help pm me.
cheers