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Branching Hydnophora Mint Green
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Branching Hydnophora – Mint Green Coral Frag
The Branching Hydnophora (Mint Green) is a visually striking coral known for its vivid mint-green colouration and unique branching growth form. With its spiked, textured branches and strong fluorescence under blue lighting, this coral adds dramatic structure and standout colour to reef aquariums.
Often referred to as a Horn Coral, Hydnophora sits at the intersection of LPS and SPS characteristics—offering bold structure and resilience while still delivering eye-catching colour and movement.
Natural Habitat & Distribution
Hydnophora corals are native to the Indo-Pacific region, where they are found across:
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The Great Barrier Reef, Australia
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Indonesia
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Fiji and Tonga
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The Philippines
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Central and Western Pacific reef systems
In the wild, Hydnophora species inhabit shallow reef slopes and exposed reef zones, where they experience strong lighting and moderate to strong water movement. These conditions influence their preference for bright light and good flow in aquarium environments.
A Brief History
Hydnophora corals have long been appreciated in the reef-keeping hobby for their fast growth, distinctive skeletal structure, and resilience. Unlike many SPS corals, Hydnophora is known for its aggressive growth behaviour, making it a popular choice for reef keepers seeking bold structure with minimal fuss.
The mint green variety has become especially popular due to its clean, modern colouration and intense fluorescence under blue-heavy lighting.
Appearance & Growth
Classified as an LPS coral with SPS-like growth, Branching Hydnophora develops upright, spiked branches with a coarse, textured surface.
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Thick, horn-like branches
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Intense mint-green colouration
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Strong fluorescence under blue and actinic lighting
Growth is fast under stable conditions, quickly creating dramatic reef structure.
Placement & Lighting
Branching Hydnophora performs best under medium to high lighting, closely replicating its natural reef environment.
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Lighting: Medium–High
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Best placed in the mid to upper sections of the aquarium
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Lower light may reduce growth and colour intensity
Flow Requirements
Provide moderate to strong, indirect flow to support healthy growth and prevent detritus accumulation. Avoid placing the coral in harsh, direct laminar flow.
Water Chemistry
Maintain stable reef parameters for long-term health:
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Calcium
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Alkalinity
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Magnesium
Along with balanced trace elements. Regular testing and water changes are recommended.
Feeding
Primarily photosynthetic, Branching Hydnophora does not require target feeding but may benefit from occasional supplemental feeding of:
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Fine powdered coral foods
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Micro-plankton blends
These feeds can support faster growth and overall vitality.
Temperament & Spacing
Hydnophora is aggressive.
It possesses strong sweeper tentacles capable of stinging neighbouring corals. Provide ample space and avoid placing near more delicate species.
Frag Size & Natural Variation
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Frag size: Approximately 1 inch
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Each frag is unique and may vary slightly in shape and colour depending on lighting and tank conditions.
Care Summary
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Care Level: Moderate
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Flow: Medium–High
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Lighting: Medium–High
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Temperament: Aggressive
🪸 Coral Care Guide
Care Level
Moderate
Lighting
Medium
Water Flow
Moderate, indirect flow.
Placement
Lower to middle areas of the aquarium.
Temperament
Peaceful.
Growth Rate
Moderate, with gradual skeletal growth and increasing polyp density over time.
Frag Size
Typically supplied as a multi-polyp frag unless otherwise stated.
💧 Water Parameters
Purple Goniopora thrive in stable reef aquariums with consistent water chemistry.
Recommended Parameters
- Stable Alkalinity
- Calcium
- Magnesium
- Stable Nitrate & Phosphate levels
- Trace elements including iodine and iron are beneficial.
Avoid ultra-low nutrient systems, as Goniopora generally perform best in mature, nutrient-balanced aquariums.
🍤 Feeding & Nutrition
Purple Goniopora benefit from regular supplemental feeding to encourage long-term health, vibrant colour and strong polyp extension.
Recommended Foods
- Fine powdered coral foods
- Phytoplankton
- Micro-plankton blends
- Small particulate coral foods
Feeding Frequency
Feed lightly but consistently 2–3 times per week.
🌊 Placement & Acclimation
Purple Goniopora appreciate thoughtful placement and a gentle introduction to your aquarium.
Placement
- Lower to middle areas of the aquarium.
- Allow plenty of space for full polyp extension.
- Avoid direct contact with aggressive or stinging corals.
- Prevent polyps from rubbing against rockwork.
Lighting
Medium lighting is recommended.
Too much light may cause the coral to retract, while insufficient lighting can reduce extension.
Light acclimation is recommended whenever introducing a new specimen.
Water Flow
Provide moderate, indirect flow that keeps the polyps gently swaying.
Avoid strong, direct flow, which may prevent full extension.
Random, alternating flow patterns generally produce the best results.
🌍 Natural Habitat
Purple Goniopora originate from the Indo-Pacific region and are commonly found throughout:
- Indonesia
- Australia's Great Barrier Reef
- Fiji
- Tonga
- Papua New Guinea
- Central and Western Pacific reef systems
In the wild they inhabit sheltered lagoon environments and protected reef zones with moderate lighting, gentle water movement and nutrient-rich conditions.
Once considered difficult to keep, advances in modern reef keeping—including improved lighting, flow control and nutrition—have made healthy, aquacultured Goniopora far more reliable long-term additions to today's reef aquariums.
⭐ ReefGro Expert Advice
Purple Goniopora is one of our favourite LPS corals thanks to its elegant movement and rich purple colouration.
When fully extended, hundreds of delicate tentacles create constant movement that contrasts beautifully with SPS colonies and other fleshy LPS corals, making it an excellent centrepiece for mixed reef aquariums.
For the best results:
- Introduce the coral slowly using light acclimation.
- Maintain stable water chemistry.
- Feed regularly with fine particulate foods.
- Avoid placing it where neighbouring corals can sting the extended polyps.
- Be patient during acclimation—healthy Goniopora often become more fully extended as they settle into stable conditions.
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