Aggregating anemone

Description:

In the first picture on the bottom left corner you can see the anemone open under water. All the shells are stuck to the outside of closed anemones above the water line. This was one of the lowest tides of the year. This is the same species as my other spotting http://www.projectnoah.org/spottings/714...

Habitat:

Anthopleura elegantissima, also known as the aggregating anemone or clonal anemone, is the most abundant species of sea anemone found on rocky, tide swept shores along the Pacific coast of North America.[1] This cnidarian hosts endosymbiotic algae called zooxanthellae that contribute substantially to primary productivity in the intertidal zone.[2] A. elegantissima has become a model organism for the study of temperate cnidarian-algal symbioses.