The marine animals are among more than 100 whales which have been held in pens for months in Srednyaya Bay, near the city of Nakhodka, which is close to the North Korean border.
News of the planned release was announced Thursday, June 20, during a nationally televised call-in show with Russian President Vladimir Putin.
Two orcas, also known as killer whales, and six beluga whales will be transported to their place of release in the Sea of Okhotsk, Russian news agency RIA-Novosti reported, citing the Pacific Branch of the All-Russian Research Institute of Fisheries and Oceanography.
Russian prosecutors began investigating the whales in November last year, after images and videos released by environmentalists showed them living in crowded pens.
Commercial capture of killer whales is strictly regulated and allowed solely for educational and scientific purposes.
News of the so-called “whale jail” prompted international criticism from animal rights activists, who said the captured whales were part of a million-dollar trade in marine animals to ocean theme parks in China.
During the call-in show on Thursday, Putin said the killer whales alone could be sold for about $100 million.
Non-profit organization Whale Sanctuary Project praised the decision. “We are gratified to see that the orcas and belugas are being transported to Khabarovsk for release,” executive director of the Whale Sanctuary Project Charles Vinick said in a statement. “This is a good day for the whales.”