It only makes sense that the Penn Plax Rialto Bridge Aquarium Decor - Medium would look great underwater - it is from Venice after all. This stupendous aquarium decoration is beautifully detailed and perfect for fish looking for a place to hide. You"ll be amazed at its realism. * High-quality resin construction * Features a small rialto bridge * Designed for both fresh and salt water aquariums * Provides fish with an obstacle to swim around * Dimensions: 18L x 4.5W x 9H in.