Safe, discreet play space for fish Natural curve and double hole design mimic an underground tunnel, providing a secure area for fish to explore and rest without drawing excessive attention. Enhanced viewing and interaction Open design promotes easy observation, allowing your aquatic pets to navigate the tunnel. This creates an engaging, immersive viewing experience for fish tank enthusiasts. Easy setup and integration Seamless installation: place the tunnel in the aquarium so that the two circular openings align with the tank's substrate standard. Finish enhancement: fill with gravel to blend the cave with the surrounding substrate for a natural look. Durable, reliable construction Material: wearresistant ABS Built to withstand aquatic environments and active pets, delivering lasting stability in the aquarium. Key attributes Function: underwater tunnel with two access points for fish to enter and exit Compatibility: designed to align with standard substrate setups in typical aquariums Size: two circular openings aligned with tank substrate; overall dimensions suited for standard home aquariums Material: wearresistant ABS for durability in water and with active fish Performance: stable, longlasting cave that maintains form while providing enrichment and viewing opportunities Use scenarios Daily enrichment in a standard freshwater tank: provides fish with a safe hideout and exploration space, helping reduce stress while encouraging natural behaviors. Observationfocused display: the open tunnel design makes resident fish more visible to observers, enhancing tank appreciation in community or display aquariums. Substratecoordinated aesthetics: when installed and gravelfilled, the tunnel integrates smoothly with the surrounding substrate, creating a cohesive tank appearance.