Sea urchins (relative of the Sea Star and Sea Cucumber) live in tide pools. They feed of algae, seaweed, and bits of small plants and animals. Sea urchins have hundreds of tiny, pointy feet. They have 5 teeth in the middle of their back. Sea urchins use their teeth to pull, tear and rip off algae from rocks.Their teeth keep growing throughout their lifespan. Sea urchin's are usually about 4 inches in size and come in a variety of colors. Purple and light pink are the most common shades.
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