Dual-Entrance Design: Features two-entry tunnel architecture that not only allows fish to swim through freely but also maintains optimal water circulation Ideal Hideout: Provides a secure and cozy space for fish and shrimp to rest, breed, or take shelter, effectively reducing stress in aquatic pets Fun Aquarium Scenery: The black tunnel creates visual depth in aquariums and can be stacked with other decor to build intricate underwater landscapes. Its design also offers multi-angle viewing Easy to Clean: The tunnel's smooth surface enables easy cleaning and maintenance. It can be removed for washing at any time to keep the fish tank clean Multi-functional Design: This aquarium tunnel measures 5.35.32.5 inches, making it suitable for most aquariums and most fish, shrimp, and other small aquatic creatures. They can enter the tunnel through the entrance to explore and forage, adding fun to the lives of aquatic pets