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“Urchin” is an old name for a hedgehog, which explains how the sea urchin got its name!

“Urchin” is an old name for a hedgehog, which explains how the sea urchin got its name! So, the sea urchin is a small, spiny, globular animal that is related to the star fish. They live in every ocean and are often black or dull shades of green, purple, olive, brown, and red.  Sea urchins have tube feet, which are part of the water vascular system and are seen on the star fish, too. They eat algae and move slowly. Sea otters, wolf eels, and triggerfish prey on the sea...

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Published By: OMGFacts - Monday, 6 August, 2012