 This allows them to detect vibrational stimuli produced by swimming prey and thus orient towards and then clutch at the prey.During courtship, males actively search (swimming/walking) for females - if a male finds a female, he slowly circles around her whilst trembling his first and second leg near the female.Males and females do not directly copulate; sexual reproduction involves the male depositing six to eighteen spermatophores onto the substrate in front of the female - if the female is sexually receptive she rubs the ventral (front) surface of her abdomen (her venter) over the spermatophore, and later transfers these to her genital aperture.