they have a lot more than 2
sea urchins live in all oceans. :-)
No. Sea urchins live in the sea.
not all are poisonous but some are.
More sea urchins.
Seastars, sea urchins, and sea cucumbers are all members of the phylum Echinodermata. Other members of this phylum include: sand dollars, brittle stars, basket stars, feather stars, sea lilies, and heart urchins.
The classification of a Sea Urchin is Echinoidea
there are excatly 3million purple sea urchins
sea urchins eat kelp.
crabs sun flower starthe crabs are as big as a rockthey are stars
Sea urchins are found in oceans all around the world, typically in shallow waters along rocky shores. They can also be found in coral reefs and seagrass beds. Some species of sea urchins can live in depths of up to 16,000 feet (4,800 meters).
Echinoderms.
They get no parental care at all.