In biologyrotationalsymmetryis calledradialsymmetry. The planerepresentationof a starfish,for example,
may haveradialsymmetry—itcan be turned(rotated)and it will look the samebefore,and after, being
turned.The photographsbelowshowhow sea stars(commonlycalledstarfish)demonstrate5-foldradial
symmetry.
(Sourceof imageon left:http://commons.wikimedia.org/wiki/Image:Starfish_02_%28paulshaffner%29.jpg,
License: Creative Commons Attribution 2.0. Source of image on right: http://upload.wikime-
dia.org/wikipedia/commons/4/45/Starfish_Roentgen_X-Ray_01_Nevit.jpg,License:GNUFree Documentation
