Dolphins are often considered the most amazing and popular of all sea animals. These adorable marine mammals are famous for their superior intelligence and cheerful disposition. But there are many more interesting dolphin facts that you might not know. For example, did you know that dolphins only use half of their brains while sleeping? Or did you know that Dolphins can eat about 30 pounds of fish a day? These are just a couple of dolphin facts. So if you are a dolphin fan (the animal), or simply like to learn about nature in general, check out these 25 cool and extraordinary dolphin facts (you wont be sorry).