(MotherNatureNetwork) It may look like a screen grab from a B-grade creature flick, that's a real living thing in the photo above. These hollow, worm-like entities can grow to a mammoth size. In fact, they've been recorded at lengths comparable to a sperm whale. Even more eerie, they are bioluminescent and will glow when touched — that is, if you're brave enough to swim up to one.
What in the world is it? It's called a pyrosome, and although these marine monsters are rarely encountered, scientists believe our oceans may be teeming with them, according to New Scientist. The picture here was captured by divers at the Eaglehawk Dive Centre in Tasmania, Australia. You can view the video footage from the encounter here: