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.
yes
yes
they have 4 babies at one birth until their pregnant again
No. Sea urchins live in the sea.
More sea urchins.
The classification of a Sea Urchin is Echinoidea
there are excatly 3million purple sea urchins
sea urchins eat kelp.
Echinoderms.
Sea urchins and other echinoderms do not raise their young. They just lay the eggs and the babies have to fend for themselves when they hatch.
in the sea
No. Sea urchins are primary consumers and only eat sea weed, algae and kelp.