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Urchin Sea Urchin The sea urchin in found across the ocean
floors worldwide, but rarely in the colder, polar regions. Sea
urchins are commonly found along the rocky ocean floor in both
shallow and deeper water and sea urchins are also commonly found
inhabiting coral reefs.     Sea urchins have a round shaped body
and with long spines that come off it. The spines of the sea
urchin are used for protection, to move about, and to trap food
particles that are floating around in the water. Sea urchins
have five paired rows of tiny tube feet which are found amongst
the spines. The feet of the sea urchin have suckers which help
the sea urchin to move about, capture food, and to hold onto the
ocean floor.  Sea urchins also have little claw-like structure
among their spines which the sea urchin uses for protection.
These structures (known as pedicellarines) are small stinging
structures that are not