Video cutting demonstrates how six belugas go into the water.
As noted, Greenpeace attracted an independent expert to view the coordinator of environmental projects of the Marine Mammals Research and Expedition Center Viktor Nikiforov.
The first batch of two killer whales and six belugas released in the natural environment on June 27, the second batch of three killer whales - on July 16.
The last group is planning to be released before the end of the summer.