From what I understand, adjacent Anemones are probably clones - they would sting each other if they weren't the same animal. The purple ends are the stinging areas. Anthopleura elegantissima.

Camera:	Nikon F100
Date:	Tuesday, June 11th, 2002
Film:	Fuji Velvia 50 (slide)
Lens:	105mm f/2.8D AF Micro-Nikkor
Photographer:	John Harvey
Scientific Name:	species related to Anthopleura elegantissima (Aggregating Anemone, Clonal Anemone)
Tag:	tide pool
Larger image:	2000 x 1333
Raw image:	2892 x 1928