By the Bluest of Seas (Russian: У самого синего моря, romanized: U samogo sinego morya) is a 1936 Soviet romantic comedy film by Russian director Boris Barnet. It is his second sound feature. Starring Yelena Kuzmina, Nikolai Kryuchkov, and Lev Sverdlin, the story centers on a love triangle between two castaways and a woman from a collective farm on a Soviet Azerbaijani island in the Caspian Sea.