A pic would really help also how big and what color is your cray?? it may be a possibility that it is a marmor krebs (marble cray) which is the only species that produces young without a male, and that it had eggs and they hatched and those are the young, they do kinda look like little bugs when the first start walking arounf and they usually cover the inside of the cave and the adult cray. But like i said a pic would be very helpful