A few species of sea cucumber can reproduce asexually, most have separate sexes that release eggs and sperm into the water for fertilization. The larvae are often free-swimming and metamorphose into bottom dwelling adults. In some sea cucumbers species, the larvae stage is omitted and the newly hatch young resemble small adults.|||asexually. i dont know how i know this!|||Sexually. One part releases a cloud of eggs - another releases sperm. The two combine in the ocean. The fertilized eggs then settle in the coral reef or ocean floor. After a while, a new sea cucumber is born.
According to Wikipedia, "Sea cucumbers reproduce by releasing sperm and ova into the ocean water. Depending on conditions, one organism can produce thousands of gametes."
The following link will give you more information about sea cucumbers:
http://en.wikipedia.org/wiki/Sea_cucumbe鈥?/a>
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