The Green Closed Brain Coral has fleshy polyps that generally hide its skeleton. It resembles a brain, due to the presence of crevices and ridges. The Green Closed Brain Coral becomes a popular choice amongst the beginner aquarists. Due to its hardy skeleton, it is very easy to maintain and that makes the Green Closed Brain Coral a valuable addition to any reef tank. You need to provide space to the Green Closed Brain Coral so that it can spread and flourishes itself well in the reef tank. Keep the Green Closed Brain Coral away from neighboring corals to avoid the stinging behavior, because it may sting them. Brain Coral is also commonly called as Honeycomb Coral, Pineapple Coral, Moon Coral, Closed Brain Coral, Brain Coral Closed Pineapple, Star Coral and Worm Coral. The ridges present on the coral actually serve as the habitat for other animals to live. It features sweeper tentacles that extend well beyond its base when open. The Green Closed Brain Coral can be aggressive towards other corals and therefore keeping it at distant place is recommended. It is nocturnal, and extends out its tentacles during the night. The Green Closed Brain Coral thrives well in temperature range of 72-78 degrees Fahrenheit, and pH of 8.10-8.40. It is a carnivore in nature and filter feeding at least twice per week is recommended. The food may include small marine invertebrates, Mysis Shrimp, meaty bits, zooplankton and phytoplankton for its growth and development.ÿAdditional traces of calcium and strontium works wonders to the growth of this coral, and hence it is advised to be added.