The lionfish can be fixed with the silicone and the suction cup. Made from Environment Friendly material - premium craft silicone, no pollution to your fish tank and no harm to your real aquarium creature. With help of wave maker, it can move in water, vivid as a real swimming fish. This lionfish can also absorb light in day-time and glow at night to show his beautiful flowing wings. Suitable for both fresh and salt water. Perfect for aquarium, fish tank or home decorating.