Here is ur paragraph.
Dolphins are highly intelligent marine mammals that live in water but breathe through a blowhole on the top of their head. They are remarkable creatures that have developed a form of sonar called echolocation to hunt and prey. They are very friendly and playful.
Dolphins have smooth, rubbery skin and are usually colored in some mixture of black, white, and gray. They have two flippers, or fins, on their sides, as well as a triangular fin on the back. Like other whales, they have an insulating layer of blubber (fat) beneath the skin.
