Siphonophoria

Zooids are individual, multicellular units of a colonial organism, each functioning semi-independently but collectively contributing to the colony's survival.

Common in species like corals, bryozoans, and siphonophores (e.g., the Portuguese man o' war), zooids often specialize in specific tasks such as feeding, reproduction, defense, or locomotion.

Despite their specialization, they remain interconnected, typically sharing resources through a common vascular or coelomic system.

This division of labor allows colonial organisms to adapt and thrive in diverse environments, with zooids acting as modular components of a highly integrated living system.