A film about the research of dolphins, about the problems facing scientists biologists and zoologists of the Utrish Marine Biological Station and the Institute. AN Severtsov, about the creation of the first spectacular dolphinarium in Moscow. The director of the film L. Popov talks and the scientific curator of the biological station and the institute, the scientist biologist L. Mukhametov (synchronously and behind the scenes). Crimea. Utrish biological station. Dolphins swim in the sea. Dolphinarium biological station. Performance of dolphins raised and trained at the Utrish biological station in the Moscow Dolphinarium. Trainers work with their pets.