The Tongan Mushroom Coral, Actinodiscus sp. is very easy to care for and maintain, and since it grows and propagates quite easily in an aquarium, this coral makes a very good choice for novice aquarists. The Tongan Mushroom Coral is semi aggressive in nature as compared to other marine aquarium invertebrates. It is recommended to keep the Mushroom Coral away from other corals just to avoid the aggressive behavior in the aquarium. It needs low water flow and low illumination for its growth and development. Often, you will find them closed when you introduce it into the tank. Once the Tongan Mushroom Coral gets acclimated to the environment, it will open up. Photosynthesis provides nutrition to the Tongan Mushroom Coral - additional feeding is not that necessary. But it has to be taken care that the currents should be able to supply it with necessary nutrients and trace elements for its continued growth.