the kaluga (huso dauricus), also known as the river beluga close up

animal wildlife fish underwater aquarium seafood invertebrate reef reptile nature amphibian food organism bird beak kaluga huso dauricus river beluga close amur amur river animal aquarium aquatic atlantic beluga caviar closeup common deep fauna fish fresh water freshwater dauricus kaluga natural ocean one russia seafood siberian sturgeon swim underwater volga wild