During mating the male red claw will attach a spermatophore (sack containing sperm) to the underside of the female between the third and fifth pair of legs. The spermatophore is white and about 1/3 inch in diameter. Within 24hours the female usually releases eggs from the pore on the base of the third pair of walking legs. These eggs are fertilized by the spermatophore as they are released.