Made of Eco-friendly polyresin material, nontoxic and durable. Do no harm to your fish. These corals simulate a fantastic sea world view, adding unique landscape and vitality to your fish tank. Vibrant color, adds life to your aquarium. Decorate your aquarium all the time with minimum maintenance. Safe for fish and suitable for fresh or salt water environments. Please note this coral does NOT glow in the dark! They are SMALL in size! Great Aftersale Service - aims to provide the best service to our customers, please buy with confidence! We reply all emails in 24 hours and provide no-question-asked refund if you received damaged item or when other product & package delivery issues happened! -