Penn Plax - Acropora Coral White Flex OrnamentPenn Plax Corals can be used to create an authentic marine environment in fresh or salt water tanks. The designs are realistic with nice tones of colour. Features: Safe for freshwater or saltwater aquariums The perfect decor, regardless of the type of aquarium you have good sized rubber Perfect for larger sized aquarium as a statement piece Heavy weight Will not move after you place in your tank Hideaways Give your fish a safer happier environment