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what is a zooid?

zooid is a single animal that is part of a colonial animal.
The zooids can either be directly connected by tissue
 or share a common exoskeleton.
The term zooid has historically also been used for an organic cell or organized body that has independent movement within a living organism.


pic shows a Praya dubia or Giant Siphonophore

 

2017  zooid-art.com