CaribSea Exotica “Elephant Skin” Rock (25 lb) – Unique grey-brown aquarium rocks with a wrinkled, weathered surface texture resembling an elephant’s skin. These rocks are excellent for building realistic decor in desert terrariums or African cichlid aquariums. Each piece has lots of grooves and ledges, great for creating caves and hiding spots for fish or reptiles. Elephant Skin rock is inert and rugged, so it won’t dissolve or change water hardness, and it instantly gives your habitat a rugged, ancient appearance as if carved by erosion over centuries.