The Hydnophora Coral has a green color. Small polyp stony coral (SPS). Planktivore. It likes to eat Filter feeding invert food only. The Hydnophora species is generally aggressive toward other tankmates. Many consider the Hydnophora species a high-maintenance specimen. Has strong lighting needs.Symbiotic algae zooxanthellae are hosted within this organism. The Green Horn Flourescent Coral, Branch Coral, Knob Coral, Horn Coral requires strong water flow. The Hydnophora is an SPS Coral that is often though of as an Acropora because of it's branching appearance but are not really related. Often thought of as an aggressive coral, it will kill most corals it comes in close contact with it. This is a difficult coral to maintain but will do well in a reef setting providing pristine water quality is kept. The coral requires moderate water movement and very strong lighting. Keep water quality high (SG 1.023 - 1.025, pH 8.1 - 8.4, Temp. 72 - 78° F). The Hydnophora Coral is commonly collected from Fiji, . Due to variations in growth of Corals from depth, environment, flow, etc. it is impossible to pinpoint exact sizes. These sizes are very approximate and will not apply in all situations.SMALL is generally smaller than a baseball, MEDIUM is generally smaller than a softball and LARGE is generally larger than a softball.

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