Domire (Green) Aquarium Fish Tank Silicone Artificial Sea Plant Anemone Decor Ornament This artificial sea plant is great for fish tank decoration. Brilliant color, very beautiful and lifelike. It is soft, flexible and dynamic, which will add unique landscape for your blank and tedious fish tank. No harm to aquarium creature, a nice place for nitrobacteria. They are Silicone products ,they haven't smell.