The effect of photoperiod on the timing of larval release in the Mediterranean brood-care polychaete Eupolymnia nebulosa (Terebellida)

The effect of light-dark cycle on the timing of larval release from jelly masses of the Mediterranean polychaete Eupolymnia nebulosa (Terebellida) was investigated. The larval emergence from the jelly mass occurs mainly during daylight. Results suggest that the larvae of E. nebulosa do not track the light - dark cycle endogenously.