Sometimes all an aquarium needs is a little wreckage, like the Penn Plax Shipwreck Aquarium Decor - Small. This is a classic aquarium decoration that both fish and human will love. It's crafted of fish-safe, non-toxic resin that's great for saltwater and freshwater. Crafted from high-quality, durable resin. Provides fish with an obstacle to swim around. Suitable for both fresh and salt water aquariums. Brings an exciting underwater ship wreck theme. Dimensions: 11.5L x 4.5W x 4H in.