A small city called Anemonia viridis

Living on her own or at big populations Anemonia viridis is one of the most common Mediterranean anthozoa species. It is the home for a big number of other species like crabs, fishes, shrimps even bacteria and algae. So she's is a real ecosystem on her own. The green fluorescent proteinis probably responsible for the ones with greenish colour. You should avoid touching her because as all the cnidarians may damage you with her stinging cells. If you want to meet the residents of this city stay in contact with medi-sea.blogspot.com .