Add some classic style to your aquarium with the Penn Plax Shipwreck Aquarium Decor - Medium. This is a timeless aquarium decoration that both fish and humans will love. It"s crafted of fish-safe, non-toxic resin that"s great for saltwater and freshwater. * Crafted from high-quality, durable resin * Suitable for both fresh and salt water aquariums * Provides fish with an obstacle to swim around * Brings an exciting underwater ship wreck theme * Dimensions: 15.5Lx 6W x 5.5H in.