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Green Seaweeds | 57

Identifying Pacific Seaweeds

descends until enough oxygen is produced to lift it again. In Japan, where the species is known as Marimo, people were so captivated by this activity that they imprisoned virtually all the wild Aegagropila balls in their private pools. Emperor Hirohito recognized the danger to the species and, upon releasing his Aega-gropila balls, decreed that the species be protected. A Japanese postage stamp commemorates this event, and A. linnaei has the distinction of being the only species protected by Imperial decree.

Habitat & Distribution

Cladophora is found in high tide pools as well as on lower exposed surfaces of the mid- and low intertidal regions from Alaska to Mexico.

Derbesia Green sea grape

Above: Derbesia marina (filamentous phase). Photo by Gary Saunders

Right: Derbesia marina (arrow shows spherical phase) atop a crustose coralline-encrusted limpet. Photo by Russ Norberg