Solvin Zankl / Portrait of planktonic Sea butterfly (Clio pyramidata) or Thecosomata Atlantic Ocean, close to Cape Verde.

Magnus Lundgren / Shelled pteropod (Diacria major) swimming with the tentacles out. Balayan Bay, off Anilao, Batangas, Philippines, Pacific Ocean

Magnus Lundgren / Wild Wonders of China / Flying sea snail (Clio sp.) photographed at night, Green Island, Taiwan. Lundgren