The common fleshy tissue or body mass shared by all the individual organisms in a colonial animal, like in corals or hydroids.
From Greek koinos (common) + sarx (flesh), directly meaning 'common flesh,' used in marine biology to describe the unified tissue connecting colonial polyps.
In a sea coral, the coenosarc is the living tissue that connects all the individual polyps—it's like they're all sharing one body and nervous system even though they look like separate creatures.
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