Giant Green Anemone (Anthopleura xanthogrammica) in captivity in the Oceanearium, Lisbon, Portugal. Photographed on 11 October 2014.Generally,
A. xanthogrammica is found along the low to mid intertidal zones of the Pacific Ocean, from Alaska to Southern California and sometimes downwards to Panama (ref. Wikipedia)
www.inaturalist.org/observations/55658630