"His body was transparent, so that Scrooge, observing him, and looking through his waistcoat, could see the two buttons on his coat behind."Cheers.
-M
This is an arctic-ocean traveling beast. It swims near the surface of the water, around and under ice flows, attracting large, fish-eating predators to the edge using its school decoy . When the polar bear, walrus or seal gets close enough or snags a fish and gets stuck on the barbs, it's dinner time.