(photos of Dirk Schories, Germany: specimens from Adriatic Sea, Croatia, Europe)
Anemonia viridis is characterized by short column and long green tentacles. Actually in most cases the column is completely hidden under the tentacles, and the species looks like a bunch of tentacles arising from substratum. This species is very common in Mediterranean and on south-west coasts of Europe. Anemonia sulcata is a synonym (invalid name) of this species.
Taxonomy:
Phylum Cnidaria
Class Anthozoa
Order Actiniaria