If you’re a big fan of lost cities, then look no further because you"ll love the Penn Plax Lost City of Atlantis Lagoon Arena. This fantastic interpretation of Atlantis will look great in any aquarium. It"s detailed and crafted of non-toxic resin. * Crafted from high-quality, durable resin * Elegantly designed Atlantis lagoon arena * Non-toxic and fish-safe * Provides fish with an obstacle to swim around * Dimensions: 17L x 12W x 11H in.