Dual-entrance design: Features a tunnel architecture with two entrances that not only allows fish to swim freely but also maintains optimal water circulation. Ideal hideout: Provides a safe and cozy space for fish and shrimp to rest, breed, or seek shelter, effectively reducing stress in aquatic pets. Fun aquarium background: 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 allows for easy cleaning and maintenance. It can be removed for washing at any time to keep the aquarium clean. Multifunctional design: This aquarium tunnel measures 13.5 x 13.5 x 6.35 cm, 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 search for food, adding more fun to the lives of aquatic pets.