American Museum of Natural History on Twitter: "You might be surprised to know that this feather-like structure—dubbed a sea pen—is a colony of polyps working together to survive in the ocean. Polyps
Get ready to "fall" for the orange sea pen - Washington State Department of Ecology
Sea pens
Sea pen - Wikipedia
Marine Scientists Amazed: Two New Species of Sea Pen Discovered in New Zealand Waters | Sci.News
Sea Pen: 2011 Philippine Biodiversity Expedition | California Academy of Sciences - YouTube