Description:Made of ceramic material that possess filtration function for aquarium and fish tank.Provides natural shelter, hiding spots, and spawning sites for your shrimp and fish.Offer the natural environment feeling and change your aquarium into a beautiful scenery.brown Ceramic Shelter is a safe, attractive, and most importantly, natural habitat, for your baby shrimps. It really gets people taking notice as they see how shrimps play inside-out in their cave thus, making it a popular choice for shrimp breeders and keepers.For Shrimps, Molting is an important stage of life cycle.During and after molting, they need a safe and quite place since their new skin is relatively soft and need time to harden.