The video shows a yellow fish swimming in a cave. The fish is seen swimming around the rocks and exploring the cave. The cave is dark and the fish is the only visible creature in the video. The fish appears to be alone and is swimming calmly. The cave is made of rock and has a rough texture. The fish is medium-sized and has a sleek body. The water in the cave is clear and the fish is easily visible. The video does not show any other creatures or objects in the cave.