Sea stars or starfish are marine invertebrates belonging to Kingdom Animalia and phylum Echinodermata, class Asteroidea. The names sea star and starfish are also used for the closely related brittle stars, which make up the class Ophiuroidea. They exhibit a superficially radial symmetry. Starfish typically have five or more "arms" which radiate from an indistinct disk (pentaradial symmetry). In fact, their evolutionary ancestors are believed to have had bilateral symmetry, and sea stars do exhibit some superficial remnant of this body structure.

Sea stars do not have movable skeletons, but instead possess a hydraulic water vascular system. The water vascular system has many projections called tube feet, located on the ventral face of the sea star's arms, which function in locomotion and aid with feeding.

As these creatures are echinoderms and not actually fish, most marine biologists prefer to replace the term starfish with the less misleading term sea star.

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Sprite has a new friend the Cowie Starjump starfish to help with visual spatial learner issues http://bit.ly/2LJAWs
jofrei (Jo Freitag) Thu, 05 Nov 2009 23:54:50 -0000
Sprite has a new friend the Cowie Starjump starfish to help with visual spatial learner issues http://bit.ly/2LJAWs
look its a dancing starfish and a dancing monkey http://bit.ly/3n4wNL :) haha !
jazziebabycakes (jasmine) Thu, 05 Nov 2009 23:50:11 -0000
look its a dancing starfish and a dancing monkey http://bit.ly/3n4wNL :) haha !
Shit,spooky! RT @mrs_bopp: Breaking News: Several Sligo starfish successfull in sinister suicide scenario... (sorry)
botticellirejct (sian ludford) Thu, 05 Nov 2009 23:45:45 -0000
Shit,spooky! RT @mrs_bopp: Breaking News: Several Sligo starfish successfull in sinister suicide scenario... (sorry)
Freak storm washes 30,000 starfish onto Sligo's Lissadell beach http://bit.ly/3sCCD3
sligotoday (Sligo Today) Thu, 05 Nov 2009 23:43:29 -0000
Freak storm washes 30,000 starfish onto Sligo's Lissadell beach http://bit.ly/3sCCD3
All those poor dead starfish :( http://bit.ly/1PZa95
SineadSinead (Sinéad Mahon) Thu, 05 Nov 2009 23:41:10 -0000
All those poor dead starfish :( http://bit.ly/1PZa95
@mrs_bopp slithering, slimy, sinuous, sligo starfish?
EvertB (Evert Bopp) Thu, 05 Nov 2009 23:38:37 -0000
@mrs_bopp slithering, slimy, sinuous, sligo starfish?

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