Both of these animals live in the water. Other than that, there's little in common between them. A smaller one is a warm-blooded mammal, highly intelligent, and curious. Its long, streamlined body is usually either blue or gray, but there are also brown and even pink species. Ranging in size from 6 to 30 ft long, dolphins don't weigh more than 11 tons. Their slippery hairless skin - that feels rubbery to the touch - is probably their most famous feature. The other animal is a notorious pre-historic predator. Growing about 60 ft long, it weighed almost 5 times more...
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