Can hermit crabs be around peppermint oils?

Peppermint oil can be toxic to hermit crabs and should not be used around them. Peppermint oil contains chemicals that can cause respiratory distress, skin irritation, and even neurological damage in hermit crabs. If you must use peppermint oil in your home, ensure to do so in a room where the hermit crabs are not present and ensure adequate ventilation to prevent fumes from reaching them.