Russian President Vladimir Putin rests after swimming during the hunting and fishing trip which took place on August 1-3 in the republic of Tyva in southern Siberia, Russia, in this photo released by the Kremlin on August 5, 2017. Sputnik/Alexei Nikolsky/Kremlin via REUTERS

Russian President Vladimir Putin and Defence Minister Sergei Shoigu rest during the hunting and fishing trip which took place on August 1-3 in the republic of Tyva in southern Siberia, Russia, in this photo released by the Kremlin on August 5, 2017. Sputnik/Alexei Nikolsky/Kremlin via REUTERS

Russian President Vladimir Putin fishes during the hunting and fishing trip which took place on August 1-3 in the republic of Tyva in southern Siberia, Russia, in this photo released by the Kremlin on August 5, 2017. Sputnik/Alexei Nikolsky/Kremlin via REUTERS

Russian President Vladimir Putin is snorkeling during the hunting and fishing trip which took place on August 1-3 in the republic of Tyva in southern Siberia, Russia, in this photo released by the Kremlin on August 5, 2017. Sputnik/Alexei Nikolsky/Kremlin via REUTERS

Russian President Vladimir Putin and Defence Minister Sergei Shoigu rest during the hunting and fishing trip which took place on August 1-3 in the republic of Tyva in southern Siberia, Russia, in this photo released by the Kremlin on August 5, 2017. Sputnik/Alexei Nikolsky/Kremlin via REUTERS

Russian President Vladimir Putin holds a fish he caught during the hunting and fishing trip which took place on August 1-3 in the republic of Tyva in southern Siberia, Russia, in this photo released by the Kremlin on August 5, 2017. Sputnik/Alexei Nikolsky/Kremlin via REUTERS

Russian President Vladimir Putin and Defence Minister Sergei Shoigu ride a boat during the hunting and fishing trip which took place on August 1-3 in the republic of Tyva in southern Siberia, Russia, in this photo released by the Kremlin on August 5, 2017. Sputnik/Alexei Nikolsky/Kremlin via REUTERS

Russian President Vladimir Putin and head of the Republic of Khakassia Viktor Zimin fish during the hunting and fishing trip which took place on August 1-3 in the republic of Tyva in southern Siberia, Russia, in this photo released by the Kremlin on August 5, 2017. Sputnik/Alexei Nikolsky/Kremlin via REUTERS

Russian President Vladimir Putin swims holding a fish he caught during the hunting and fishing trip which took place on August 1-3 in the republic of Tyva in southern Siberia, Russia, in this photo released by the Kremlin on August 5, 2017. Sputnik/Alexei Nikolsky/Kremlin via REUTERS

Russian President Vladimir Putin holds a fish he caught during the hunting and fishing trip which took place on August 1-3 in the republic of Tyva in southern Siberia, Russia, in this photo released by the Kremlin on August 5, 2017. Sputnik/Alexei Nikolsky/Kremlin via REUTERS

Russian President Vladimir Putin prepares for snorkeling during the hunting and fishing trip which took place on August 1-3 in the republic of Tyva in southern Siberia, Russia, in this photo released by the Kremlin on August 5, 2017. Sputnik/Alexei Nikolsky/Kremlin via REUTERS

Russian President Vladimir Putin and and Defence Minister Sergei Shoigu (L) float in a boat while they fish during the hunting and fishing trip which took place on August 1-3 in the republic of Tyva in southern Siberia, Russia, in this photo released by the Kremlin on August 5, 2017. Sputnik/Alexei Nikolsky/Kremlin via REUTERS

Russian President Vladimir Putin and Defence Minister Sergei Shoigu ride a boat during the hunting and fishing trip which took place on August 1-3 in the republic of Tyva in southern Siberia, Russia, in this photo released by the Kremlin on August 5, 2017. Sputnik/Alexei Nikolsky/Kremlin via REUTERS

Russian President Vladimir Putin swims during the hunting and fishing trip which took place on August 1-3 in the republic of Tyva in southern Siberia, Russia, in this photo released by the Kremlin on August 5, 2017. Sputnik/Alexei Nikolsky/Kremlin via REUTERS