close-up pneumatocysts fronds of California giant kelp Macrocystis pyrifera and encrusting bryozoans Membranipora tuberculata Catalina underwater underwater

Bulbs, Fronds and Bryozoans - #36

Close-up of the pneumatocysts and fronds of a California giant kelp (Macrocystis pyrifera). Pneumatocysts are gas-filled bladders which keep the upper portions of the kelp afloat. The small white specs on the fronds are tiny colonies of animals called bryozoans (Membranipora tuberculata). Photographed at Casino Point in Avalon, California.

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