Mysterious underwater 'blob' video goes viral

Video of a mysterious underwater blob is making the rounds on the internet, with some experts saying it's a giant jellyfish. But some observers see nothing more than a big plastic bag.

Video of a mysterious underwater blob is going viral. It was apparently shot at an undisclosed deep-sea location by an underwater camera in late April. Experts and armchair observers have weighed in with suggestions that it's a giant jellyfish. Or maybe it's a whale placenta. Or a plastic bag or a fishing net.  But it does appear to have organs and appendages. Or maybe not.

What does it look like to you?