The video shows a fish tank with a group of small fish swimming around. The fish are mostly blue and green in color, with some having black stripes. The tank is filled with small rocks and pebbles, and there is a filter in the background. The lighting in the tank is dim, creating a calm and serene atmosphere. The fish are moving around freely, some swimming near the bottom of the tank while others are closer to the surface. The video does not contain any visible text or subtitles.