"The rare sight of a giant squid swimming inside a marina was captured on video on the cost of the Sea of Japan.
According to a manager at the Mizuhashi Fisherina in Toyama prefecture, about 250 kilometers northwest of Tokyo, one fisherman found a 3.7-meter (12.1 feet) giant squid swimming beneath fishing boats docked at the marina on the morning of Dec. 24."
The extraordinary close up video taken by divers shows the giant squid's natural coloration as well as the action of its siphon propelling it through the water. Additional footage here.