(photo by Paul Nicklen)
Red sea urchins (Strongylocentrotus franciscanus) are colorful creatures, varying between a uniform red and dark burgundy, that crawl slowly over the sea bottom using their spines as stilts. Sea urchins belong to the marine invertebrate group called echinoderms (see this previous post for more information) Red sea urchins graze on attached or drift seaweed and kelp using their mouths which are located on the ventral surface of the animal. They have specialized jaws consisting of 5 teeth used to devour plant material. They use their feet to hold on to the bottom while feeding, but they can move quickly using their feet, spines, or even their teeth. See this previous post to see another species of sea urchin.
(Source)

(photo by Paul Nicklen)

Red sea urchins (Strongylocentrotus franciscanus) are colorful creatures, varying between a uniform red and dark burgundy, that crawl slowly over the sea bottom using their spines as stilts. Sea urchins belong to the marine invertebrate group called echinoderms (see this previous post for more information) Red sea urchins graze on attached or drift seaweed and kelp using their mouths which are located on the ventral surface of the animal. They have specialized jaws consisting of 5 teeth used to devour plant material. They use their feet to hold on to the bottom while feeding, but they can move quickly using their feet, spines, or even their teeth. See this previous post to see another species of sea urchin.

(Source)

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