Aquarium Corner Cave with Viewing Window – 2-Hole Fish Hideout for Plecos, Cory Catfish, Shrimp, Kuhli Loach, Betta – Safe Plastic Undergravel Shelter for Bottom Dwellers (5″x5″x2″). Transform Your Aquarium with Our Corner Cave Hideout!This 2-hole underground fish cave is the ideal retreat for bottom-dwelling species like plecos, cory catfish, kuhli loaches, shrimp, and bettas.