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, a fish endemic to Lake Malawi in east Africa Blue Dolphin and Blue Dolphin 2, ships operated by Tsugaru Kaikyō Ferry in Japan