This is how many annelid polychaetes reproduce. At breeding time, the body of both sexes differentiates into two regions, an anterior atoke and a posterior epitoke, in which gonads develop. When the moon is in a specific phase, the epitoke separates from the rest of the body and swims to the surface, releasing gametes.
Bottom line, you'll have some bouncing baby BW's...not really good or bad, depending on how you feel about BW's...