The video shows an underwater view of several fish swimming in a clear aquarium. The tank is well-aerated, with numerous small bubbles visible in the water. The main subject is a large, dark-scaled fish with a somewhat flattened head and a prominent mouth. It initially faces the camera, revealing its dark eyes and reddish-pink lips, before turning and swimming horizontally across the frame. Its scales are dark grey to black with some lighter, iridescent patches, and its fins are visible as it moves. Below it, a lighter-colored fish with a more elongated body and smaller, silvery-grey scales swims horizontally across the lower part of the frame. This fish appears to be a different species, possibly a mullet. Partially visible at the bottom of the tank are other fish and what appears to be an air stone or filtration tubing. The fish are actively swimming, and the water is clean. The background outside the tank is blurry and indistinct. The scene is likely from a seafood market or restaurant where live fish are kept for display and sale, located in Ulsan, South Korea. No people or visible text are present in the video.