the blob has apparently now been identified as a rare specimen of the deep sea jellyfish Deepstaria enigmatica. Cool name, crazy-looking creature! – via TDG
This has now also been confirmed by Dr. Steven Haddock of the Monterey Bay Aquarium Research Center, an expert on deep-sea and pelagic creatures.
“There is a video of the scyphomedusa Deepstaria enigmatica “floating” around right now. This bag-like jelly is not that rare, but is large, so rarely seen intact. In the video, the swirling from the sub makes the medusa appear to undulate and it even turns inside-out. Here are some images of a more “typical” specimen. The web-like pattern is not a nerve net, as some comments have said. It is branches from their digestive system.”