The Japan sea is the true pearl among all Russian seas. It’s northern and tropical at the same time and that mix makes the Japan sea absolutely unique. Underwater life here feels like a boiling pit full of invertebrates – so many different creatures are moving around you every minute. Also here lives real-world aliens – cephalopods. I never was as emotional as when I saw 6 meters long octopus… It’s amazing. The Japan sea is wonderful place for diving, you need decades to see all the living stuff here.