Whale

During Japan's 1,200-year meat-eating ban, people devised creative loopholes. They classified rabbits as birds by calling their ears "wings," dubbed wild boar "mountain whale" to pass it off as fish, and claimed ducks were fish because they had webbed feet.

The Chinese zodiac animals vary by country. What is a dragon in Korea is a seagull in India, a whale in Iran, and a snail in Central Asia. In Vietnam, the "rabbit" position is held by a cat.

If more cells mean higher cancer risk, whales and elephants should constantly get cancer. Yet they rarely do—less often than smaller animals. This contradictory phenomenon is called "Peto's paradox."