Looks like one of the Zerg from StarCraft.  And a giant, land-going sea butthole.  And, because it's Japan, bukkake is included, free of charge!

Just what every man on the globe needed: Proof of vagina dentata.

I honestly haven't any idea what it must be. I do always like coming across something novel and attempting to classify it. Some kind of mollusk, probably. The way it grouped on the rock face was interesting. This could also be a total fraud, for all I know, which is pretty much how I react to anything with such bizarre behavior that cannot be accounted for. Check 'Gastropoda' in teh Wikiz, and there's a pretty familiar picture, but I have no clue how they can manage out of water.

Emmeran wrote:

without a doubt someone's film 101 final

I'm leaning towards this opinion.

Taint wrote:

I predict it will be exposed to prolonged bursts of gamma radiation, causing it to grow to heights of 200 feet or more. Afterward, it will rampage across Tokyo killing thousands and destroying Tokyo Tower before being frozen, blown up, or disappearing back into Yokohama Bay to appear in a sequel later on.

And then fight Godzilla and Hillary Clinton for world domination.

jesusluvspegging wrote:

Link to YouTube page

One of my favorite songs.

I call Rule 34.