The Dreaded Majano Anemone - The majano anemone presents somewhat of a paradox. Many owners of saltwater aquariums want to kill them off at all costs, yet there are others who would like to purchase one or more if they can find them for sale. The majano anemone has been described as "cute" and also as "terrible". It is in truth a rather attractive small anemone, having fluorescent green tentacles, and in an aquarium where there is not an abundance of nutrients, it may be kept under control. If the environment is rich in nutrients however, you can soon expect a tank full of these anemones. Probably not your goal as a saltwater aquarium keeper.
The Majano Problem - The problem the majano anemone presents is that while by itself it appears to be a rather docile creature, minding its own business, it has a disturbing tendency to divide and conquer. In other words it is extremely invasive. One can have an attractive saltwater aquarium, complete with a coral reef and a majano anemone or two, and before long, everything is covered with the anemone. So, it's little wonder that it is an undesirable creature to have. Not only undesirable, but in the view of many, very difficult to bring under control or get rid of.