1. It is suitable for breeding and spawning of pet shrimp AO shrimp short bream, native Douyu and other fish species. 2. Shelter for benthos, nocturnal or small fish. 3. It is specially made of resin material and does not fade or dye. The image is vivid. 4. It can be used as an ecological decoration in the cylinder. 5. Moss can be tied and planted on products hairline rule to create a more natural ecological environment.