A small, light-colored fish with some yellow/greenish fins, possibly a betta fish, swims near the top of a fish tank. The fish tank has a black lid and contains water that appears slightly murky or green. At the bottom of the tank, there is bright red and yellow gravel, and a pink and green castle-shaped aquarium decoration is situated on the left side. A black aquarium filter/pump is visible on the right side of the tank. The fish swims from the left to the right, briefly going behind the filter, and then swims back towards the left, remaining mostly near the water's surface throughout the video.