Pyrosomes are pelagic (free-swimming) tunicates or sea squirts that live in the open ocean, as colonies of tiny animals that form hollow tubes sealed at one end. Divers off the Tasman Peninsula caught this giant Pyrostremma spinosum on video in 2011 or earlier (judging by the YouTube video upload date), a colony that can reach 30m in length and looks pretty much like that water tentacle thing or pseudopod in the movie The Abyss. Via coolweirdo.com
The Abyss
