In most cumacean species males are semipelagic, swimming about until they find a female. In a few species within several families, males have lost their swimming ability and have developed grasping antennae, which are used to hang on to the abdomen of females until mating has occurred. Eggs are carried in a ventral brood pouch on the female, where they are incubated until hatching as juveniles. There is no pelagic larval stage. Both males and females of most species reach terminal molts at sexual maturity.
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