A Russian fisherman’s deep-sea catch of a bizarre smooth lumpfish has ignited online debate, with many likening it to an alien.

Caviar -- just the name invokes associations of decadent luxury. You might think of a small spoonful served in first class airlines, or a caviar-topped bite presented at a lavish dinner party.

Editor's note: This is part of a series of videos offering an up-close perspective on the animal kingdom. A special 360-degree video camera system was set up in zoos and other facilities to show ...

He later identified the creature as an Aptocyclus ventricosus, also known as the smooth lumpfish or smooth lumpsucker. This species of marine ray-finned fish, which can grow up to a huge 44cm ...