Most polychaetes have separate genders, instead of being androgynous. The most primitive species have a couple of gonads in every section, except most species show some level of specialization. The gonads shed youthful gametes straightforwardly into the body depression, where they finish their improvement. Once develop, the gametes are shed into the encompassing water through channels or openings that change between species, or at times by the complete crack of the body divider (and consequent passing of the grown-up). A couple of animal types make love, however most prepare their eggs remotely.
The prepared eggs normally bring forth into trochophore hatchlings, which skim among the tiny fish, and in the long run transform into the grown-up structure by including fragments. A couple of animal categories have no larval structure, with the egg incubating into a structure taking after the grown-up, and in numerous that do have hatchlings, the trochophore never bolsters, getting by off the yolk that remaining parts from the egg.
A few polychaetes display striking reproductive systems. For a large part of the year, these worms resemble some other tunnel abiding polychaete, yet as the rearing season approaches, the worm experiences a striking change as new, concentrated sections start to develop from its backside until the worm can be unmistakably isolated into two parts. The front a large portion of, the atoke, is abiogenetic. The new back half, in charge of reproducing, is known as the epitoke.