Aquatic creatures. South Korea

The following video was aired recently on South Korean television. The video shows a large dark spot, rapidly moving at the water surface in the sea of Namhae. It is known that intriguing frames were made by two friends, who managed to capture the alleged anomaly before it fell into the deep and disappeared from sight.

The speaker argued that it was an impressive school of fish, however, many viewers immediately suspected that we are talking about something else. Moving too quickly this mysterious object, vanishing near the island. You would think that over the sea flying any aircraft, which cast on the surface of Namhae shadow, but it isn't anything like that in the air is not seen, moreover, that dark spot disappears near the land.

Among users of the world wide web sparked a heated debate about the nature of this object:

• some regulars Network, convinced that it was a water monster similar to Nessie. And why not, after all, here in the Black sea, the Karadag snake exist, such as mystical and mysterious as Nessie, why can't they appear in a sea of Namhae;
• others believe that we are talking about moving at great speed in the water "flying saucer" aliens who are able to do this without any damage to the machine;
• according to third-party commentators before us the secret of a futuristic submarine, or even a floating base earthly origin. However it could be aliens, since they also have their own underwater vehicles.

And what, in your opinion, the most reasonable explanation?

Translated by «Yandex.Translator»