American blues-rock band formed in San Francisco in 1969 by Jefferson Airplane members Jorma Kaukonen (guitar/vocals) and Jack Casady (bass). Originally a side project; became a full-time pursuit after the Airplane disbanded in 1972. Style spans acoustic country blues and electric heavy blues, often distinguished by extended improvisational sets.
Released 16 studio albums between Hot Tuna (1970) and Steady as She Goes (2011). Active intermittently across five decades, with Kaukonen and Casady the only continuous members.