Intertidal zone species
Sea urchins, mussel shells, and starfish, often found in the intertidal zone, are adapted to this rugged environment.
Source
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"OpenStax College, Aquatic Biomes. October 17, 2013."
http://cnx.org/content/m44859/latest/Figure_44_04_02.jpg
OpenStax CNX
CC BY 3.0.
