The Exotic Environments Human Skull Ornament is a life-like human skull replica with a whole in the cranium to provide valuable shelter and a hiding place that fish crave. Your fish will love exploring and navigating through this replica skull aquarium ornament! Provides shelter and a place to explore Incredibly realistic aquarium ornament Safe for all aquariums This hyper-detailed aquarium decoration is safe for use in all salt and freshwater fish tanks, and terrariums and reptile enclosures too!