The Blue Whale
The Blue Whale is the largest known animal to have ever existed. These mammals reach up to one-hundred feet in length and weigh over two-hundred tons. Blue Whales are also some of the loudest animals on earth, but the frequencies they create are too low to be picked up by the human ear. Despite its massive size, these whales pose little threat to humans. Their diet consists of small fish and krill, and sometimes even interact with whale watchers in a playful manner out of sheer curiosity. These guys are gentle giants, for sure.