The Aquarium Trunk Decoration Hollow Tree Trunk Hideout Log Hideaway Fish Tank Resin Wood Ornament Reptile Habitat Cave for Fish and Shrimp is a great way to add some style to your fish tank. Made from natural resin, this trunk decoration is light but durable and provides a place for your fish to hide. The hollow design makes it easy for you to fill with fish food and clean, while the lack of a back prevents fish from escaping.