rectangular fish tank filled with water, gravel substrate, plastic plants, and a castle decoration

rectangular fish tank filled with water, gravel substrate, plastic plants, and a castle decoration. Numerous small, colorful fish swim throughout the tank, some congregating near the castle. The tank is lit from above. The background consists of white vertical stripes. The camera initially focuses on the left side of the tank, then pans slightly right to center the castle and finally lifts to show the top of the tank. No people are visible in the frame. The fish are the main focus of action and interaction within the enclosed environment.