Sexes are separate. Males and females cannot be identified externally except for the differences in colour of the ripe gonads in the living specimens.Testes of male and ovaries of female are similar. They are sac-like bodies occuring in saveral longitudinal rows in the genital wings, on either side of the alimentary canal.Each gonads has a narrow neck or ductule that opens out through a gonopore. All gonopore are situated outer to the gill pores. Ova are small with poor yolk content.
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