The mahi-mahi (/ˈmɑːhiːˈmɑːhiː/)or common dolphinfish (Coryphaena hippurus) is a surface-dwelling ray-finned fish found in off-shore temperate, tropical, and subtropical waters worldwide. Also widely called dorado (not to be confused with Salminus brasiliensis, a fresh water fish) and dolphin, it is one of two members of the family Coryphaenidae, the other being the pompano dolphinfish. These fish are most commonly found in the waters around the Gulf of Mexico, Costa Rica, Hawaii and Indian Ocean.
The name mahi-mahi comes from the Hawaiian language and means "very strong", through the process of reduplication. Though the species is also referred to as the common dolphinfish, the use of "dolphin" can be misleading as they are not related to dolphins; see Coryphaena for the possible etymologies of "dolphinfish". In parts of the Pacific and along the English-speaking coast of South Africa, the mahi-mahi is commonly referred to by its name in Spanish, dorado.In the Mediterranean island of Malta, the mahi-mahi is referred to as the lampuka.
Linnaeus named the genus, derived from the Greek word, κορυφή, koryphe, meaning top or apex, in 1758. Synonyms for the species include Coryphaena argyrurus, Coryphaena chrysurus, and Coryphaena dolfyn.