Dolphins always swim with a buddy -- Dolphins speak their own language -- Dolphins swim fast and jump faster -- Dolphins see under the water and above it -- Dolphins do not chew their food -- Dolphins have built-in radar -- Dolphins sleep with one eye open -- Dolphins shed their skin -- Dolphins are born with belly buttons -- Dolphins are great at teaching their young -- Dolphins are playful, fun-loving creatures -- Dolpins lend a helping fin -- Fact sheet.