Create a Safe Haven for Your Fish with Our Aquarium Tunnel! Specificities: - The Aquarium Tunnel is designed to fit perfectly in the corner of your aquarium, allowing you to observe the fascinating activities of your fish inside the tunnel. - Measures 6.69 x 6.69 x 2.36 inches, with a cave opening width of 1.73 inches, making it an ideal size for various fish species. - Particularly appealing to bottom-dwelling species like Ancistrus, who naturally seek shelter and hiding spots in their environment. - The tunnel sinks easily in freshwater, while in saltwater, you may need to add bottom sand to keep it submerged securely. - Enhance the aesthetic of your aquarium by adding base sand or decorative stones above the Fish Hideout for a more natural look.