Sea pens are colonial marine cnidarians belonging to the order Pennatulacea. There are 16 families within the order; they are thought to have a cosmopolitan distribution in tropical and temperate waters worldwide.
If you believe that waves, waterscapes, and waterfalls pretty well use up all the opportunities that water provides for picture-taking, think again. Here are seven more photography tips with water—remedies for the photo doldrums!
Melissani Cave, on Kefalonia Island in Greece, features a sky-blue lake within the cave. The lake is shallow and clear, and is covered with stones at the bottom. The cave was rediscovered in (In Greek mythology, Melissani was the cave of the nymphs.