Your fish will be the royalty of the sea when they pass through the Penn Plax Lost City of Atlantis Royal Arches. This fantastic recreation of the Atlantis royal arches will look cool in any underwater setting. Plus, fish love swimming in an around it. It"s greatly detailed and crafted of non-toxic resin. * Durable resin construction * Elegant royal arches Easter island * Designed for both fresh and salt water aquariums * Non-toxic and fish-safe * Dimensions: 16L x 9W x 9H in.