 2. BLUE WHALE
Weighing 200 tons and measuring 100 feet long, the blue whale is not only the largest animal on the planet, but possibly the largest animal to have ever lived. You'd think a body that big would want to take on some pretty hefty prey, but the blue whale feeds almost exclusively on krill (a type of shrimp-like marine invertebrate less than an inch long for those of you not in the Krill of the Month Club). Of course, we're not talking just one krill here and there — more like up to 40 million in one day. It's sort of like their version of potato chips or popcorn. The only time blue whales take a break is during their eight-month breeding season, when they often withhold from eating
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