Помогите!! Нужен рассказ о дельфинах на английском, 6-7 предложений

Dolphin - aquatic mammals unit cetaceans belonging to a family of dolphins - sea or to the river dolphins superfamily - freshwater. Dolphins are very intelligent and beautiful zhivotnye.Oni live in the seas. Weight: Orca 3 600 kg, Bottlenose Dolphin: 150 - 650 kg