Nice spotting!

 

A beautiful White-spotted Anemone (Urticina lofotensis, formerly Tealia lofotensis) discovered nestled among mussels during a field trip to Spud Point Marina on 27 June 2016.  

Although this species can reach sizes of up to ~150-200 mm (~6-8 inches) across (including the tentacles), this tiny individual was only ~8 mm (~0.3 inches) across!

The deep red or scarlet color is distinctive, as are the white spots on the column — more easily seen when the tentacles are withdrawn (below).

 

Nice spotting, Chessie!