Sea Urchins are widely known for their ability to rid nuisance algae.
They are commonly seen on the sand bed or in the live rock, making their
way around, constantly cleaning up leftover fish food and algae. Sea
Urchins are very popular due to their friendly nature, not bothering
other sea life and they do well in most conditions. They are easy to
identify as they have a round center with spines which it uses to move
around but also as protection from predators.