Aquarium or Akvarium (Russian: Аквариум; often stylized as Åквариум) is a Russian rock group formed in Leningrad in 1972. The band had many line-up changes over its history, and lead singer and founder Boris Grebenshchikov is the only remaining original member. Former band members include Anatoly Gunitsky, Mikhail Feinstein, Andrei "Dyusha" Romanov, Vsevolod Gakkel, and Sergey Kuryokhin.