The image shows a group of small fish swimming in a tank filled with small blue and white pebbles. The tank appears to be made of glass and is filled to the brim with the colorful stones. The stones are scattered throughout the tank, creating a textured surface. The fish are of different sizes and colors, including blue, white, and gray. Some of the stones are small and round, while others are larger and more densely packed together. The background is a plain white wall, which contrasts with the vibrant colors of the tank.