In the video, we see a crab crawling on the ocean floor. The crab is red and has long legs. The ocean floor is covered in seaweed and other plants. In the background, we can see a large fish swimming. The water is clear and the sunlight is shining through, illuminating the scene. The crab moves slowly and deliberately, exploring its surroundings. The fish in the background seems to be unaware of the crab's presence. The video captures the natural beauty and diversity of marine life.