small aquarium with a black gravel substrate

small aquarium with a black gravel substrate. Scattered on the gravel are several bright green decorative stones. There are two brown, sponge-like decorations: one larger in the lower-center of the frame, and another smaller and partially obscured in the upper-left. A few small, colorful fish, including yellow, red, and neon green varieties, swim in the water. The water appears clear with a few air bubbles visible near the surface. The lighting is somewhat dim, creating a slightly dark ambiance inside the aquarium.