How does a sea cucumber reproduce?

im doing a progect in school.|||Sea cucumbers tend to be have separate sexes. Spawning behaviour tends to be seasonal. Many Sea cucumbers on the Great Barrier Reef spawn during the mass spawning events seen in November. During spawning, sea cucumbers travel to the top of reef structures and release their gametes into the surrounding currents. A range of developmental modes is seen among sea cucumbers. Development via feeding larvae (Planktotrophy) or non-feeding larvae (lecithotrophy) occur in a large number of species. In others, embryos and larvae may be brooded by the female. The feeding larva of sea cucumbers (when present) is very distinctive and is called an auricularia larva. Itswims for about 10-40 days before settling on the bottom and metamorphosing into a baby sea cucumber.