In the video, a yellow fish is seen swimming in a tank. The fish has a distinctive shape and is the main focus of the video. As the fish moves around, it comes across a crab and a small orange and white fish. The crab is stationary and appears to be resting on a rock or similar structure in the tank. The orange and white fish is swimming around, but it does not interact with the other two creatures. The tank itself is not clearly visible, but it appears to be a standard aquarium setting. The lighting in the tank is bright, highlighting the colors of the fish and the crab. There are no visible titles, subtitles, or informative text in the video.