Open/Trachy Red Brain CoralTRACHYPHYLLIA Brain Coral is also referred to as a Folded Brain ,Crater coral or Geoffroyi are large polyp stony (LPS) CORAL. Open Trachy may be a folded or figure eight shape and comes in colors like red,green, tan. Tracy Brain coral fluoresce brightly under lighting they do best in a well established reef tank aquarium. Food: on micro plankton or food designed for filter feeding invertebrates . APPROXIMATE SIZE: SM 2 INCHES TO 3, MD 3INCHES TO 4