Ummm...it's the thing from which a sea urchin hatches?
Yes,
Sea urchins reproduce by releasing eggs and sperm into the water, where external fertilization takes place. Once fertilized, the eggs develop into larvae that eventually settle and grow into adult sea urchins. Some species of sea urchins can also reproduce by asexual means, such as splitting or budding.
The sea archin releses sperm and eggs in to the water the eggs then get firtilised
No, they lay eggs.
Sea urchins reproduce by releasing eggs and sperm into the water, where fertilization occurs externally. Once fertilized, the eggs develop into larvae and eventually settle onto the ocean floor to grow into adult sea urchins. The larval stage allows for dispersion and colonization of new areas.
Sea urchins reproduce sexually, with males releasing sperm into the water and females releasing eggs. Fertilization occurs externally, and the resulting larvae develop in the water before settling and growing into adult sea urchins.
Eggs of a marine animal such as fish or sea urchins.
they give birth~ Sea urchins generally have separate sexes and spawn seasonally every year. Eggs and sperm are usually released to the water column where fertilisation occurs.
No. Sea urchins live in the sea.
The female sea urchin produces several million eggs per year, and the reproductive organs of a sea urchin can be up to 80 percent of a sea urchin's mass during mating season.
More sea urchins.
The classification of a Sea Urchin is Echinoidea