The Trumpet Coral, Caulastrea sp., has multiple polyps that resemble the horn-end of a trumpet. They are sometimes known as candy cane corals for their striping patterns. They are a hardy and peaceful organism that should still be placed some distance from other corals to avoid them damaging each other. They requie moderate light and moderate waterflow and are best introduced into the tank by being placed towards the bottom of the tank. The Metallic Green version of this coral has striking green colors and fluoresces very brightly under antic lights.