I think my favorite animal is a dolphin I think they're really me and that their mammals like we are live in a group pod things are very interesting creatures did you know that dolphins belong in the same families Delphinidae the oceanic dolphins platanistidae in the indian river are dolphins pontoporiidae the brackish dolphins Various species of dolphins exhibit sexual dimorphism where the males are larger than females. They have streamlined bodies and two limbs that are modified into flippers. Though not quite as flexible as seals, they are faster some dolphins can briefly travel at speeds of 29 kilometres per hour (18 mph) or leap about 9 metres 30 ft Dolphins use their conical teeth to capture fast-moving prey. They have well-developed hearing which is adapted for both air and Water they have a layer of fat, or blubber, under the skin to keep warm in the cold Water most species prefer the warm waters of the tropic zones, but some, such as the right whale dolphin, prefer colder .