Blue dolphin

Blue dolphin or Blue Dolphin may refer to:


 * Blue Dolphin, a yacht and research vessel designed in 1926 by William Roue
 * Blue Dolphin Energy Company, an American oil and natural gas company
 * Blue Dolphin Enterprises, parent company of Pacific Comics, a former American comic book publisher
 * Blue dolphin cichlid (Cyrtocara moorii), a fish endemic to Lake Malawi in east Africa
 * Blue Dolphin and Blue Dolphin 2, ships operated by Tsugaru Kaikyō Ferry in Japan