Coconut shell serves as a stand shelter for the hermit crab, or a shelter for aquarium fish: ancistrus, pleco, catfish, betta and shrimp. It can also be used as a stand for spiders, lizards, snails, frogs, turtles. The hollow interior of the case creates a natural cave appearance, and a completely natural, environmentally friendly material. The top of the coconut is a little hairy, which can be eaten by animals. this is normal and good for fish It can be used in both wet and dry environments. Note:Before putting it into the fish tank, it can to be boiled (optional). Pre treatment is required before placing in the fish tank. Pour water over coconut and bring to a boil for 15 minutes. Repeat the procedure 3 times. This is enough to release tannins and will not color the water. Before placing them in a dry terrarium with reptiles, just pour boiling water over them.