The image shows a large aquarium filled with crayfish. The tank is made of glass and is filled with water. The crayfishes are of different sizes and colors, including brown, orange, and black. They are arranged in a neat and orderly manner, with some overlapping each other. The water in the tank is a deep blue color, and there are a few small rocks visible in the bottom right corner. The background is dark, and the tank appears to be well-lit.