Blackfin may refer to: Blackfin, a family of embedded DSP microprocessors. Blackfin cisco, member of the whitefish sub-family. Black fin conger, an eel in the family Congridae. Blackfin snake eel, or "highfin snake eel" of the family Ophichtidae. Blackfin tuna, the smallest tuna species. Black-finned anemonefish, of the family Pomacentridae. Blue black-finned chub, a species of parrotfish. "Black Fin", a 2021 song by Zior Park
See also The Black Fins, New Zealand national surf life saving team.