And no. I'm not talking about dolphins. Known as "Ningen", these giant creatures are said to be swimming the antarctic. Sightings have come from Japanese whalers. See more artist's renditions and a description here:
Reportedly observed on multiple occasions by crew members of government-operated “whale research” ships, these so-called “Ningen” (lit. “humans”) are said to be completely white in color with an estimated length of 20 to 30 meters. Eyewitnesses describe them as having a human-like shape, often with legs, arms, and even five-fingered hands. Sometimes they are described as having fins or a large mermaid-like tail instead of legs. The only visible facial features are the eyes and mouth.
The Japanese "whale research ships" have been in the news recently too. There is a rather vocal and well publicized group (ever hear of Whale Wars on Animal Planet?) protesting the "research" of these ships, claiming that they are actually poaching the whales. Last week these groups literally collided when their ships crashed into each other, and fingers are pointing from both sides as to who is at fault. I'm not taking sides on this one. Although, as far as the protesters are concerned, cruising around in a black futuristic jet-boat with skull and crossbones painted on it and throwing stink bombs doesn't really make one look innocent of maritime shenanigans.
But back to these so-called "Ningen". Some say the creatures were invented by the government to take attention away from the alleged poaching of the whales. Others think they are the tortured souls of the poached whales themselves wandering the earth, so to speak. OR maybe the Japanese government and the protesters are actually working together to boost ratings for Animal Planet! I guess we'll never know for sure (If the Ningen exist. . . Or what they taste like).