From Live Science:

Huge Jelly Blobs Spotted Off Norway Coast: What Are They?

Giant, jelly-like blobs have been sighted off the western coast of Norway, but the identities of these mysterious objects have scientists stumped.

The blobs are about 3.3 feet (1 meter) in diameter and are translucent, except for a strange dark streak running through their center, Science Nordic reported. No one knows what they are, or what made them.

“This is a mystery, actually,” said Michael Vecchione, an invertebrate zoologist at the Smithsonian Institution who has been corresponding with Norwegian researchers about the blobs. “It could be an egg mass, or something completely different, but we just don’t know at this point until we get some more detailed observations.”

Watchers of The Prisoner know, of course:

It’s Rover.