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Siphonophore Aggregation (Biotic Group)

Component: Biotic

Unique Identifier: 452

Biotic Setting Planktonic Biota
Biotic Group Zooplankton
Biotic Subclass Gelatinous Zooplankton
Biotic Group Siphonophore Aggregation
Biotic Community Bargmannia Aggregation
Nanomia Aggregation
Physalia Aggregation


Description
Definition Water parcels in which these jellyfish-like animals aggregate and are the dominant form of zooplankton. Siphonophores are colonies of many individual animals (polyps) that are each specialized for various roles (stinging tentacles, locomotion, and digestion) but appear and function as a single animal. Siphonophores are important predators on other zooplankton and small fishes. Most siphonophores are actively mobile, but the best-known siphonophore (the Portuguese man-of-war, Physalia) drifts with the wind using a gas-filled sac.