Sea urchins crawl slowly on the bottom of the ocean floor, using their spines as stilts.
As they move, they scrape off and tear up plant material from the bottom and feed on kelp and seaweed. Their habitat consists of a preference for rocky ground in areas that are not subject to extreme wave action. These animals live for seven to ten years and can grow up to 10 cm in diameter. The maximum age for green sea urchins may be up to 20 to 25 years. B.C. This restriction allows sea urchins to spawn at least once before being recruited to the fishery.