Quick Facts
Type: Echinoderm
Diet: Herbivore: Brown and green algae
Average lifespan: 20 years
Average size: 2–5 in.
Average weight: Unknown
Did You Know?
Scientists have discovered that the red sea urchin has one of the longest lifespans of any animal. Red sea urchins have been found that are believed to be 200 years old!
Last updated: November 9, 2018