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Hydnophora sp.
Coral with dense small bumps (hydnophores) on surface. Between LPS and SPS in care. Fast-growing with beautiful fluorescent green. Aggressive — careful placement needed.
Hydnophora (family Merulinidae) is distributed across Indo-Pacific reef slopes and lagoons, distinguished by the dense conical projections (hydnophores) covering its skeleton. Growth forms vary from encrusting to massive to branching, with greens, fluorescent green, and browns; representative species include Hydnophora rigida and Hydnophora exesa. It tolerates moderate lighting and moderate flow and is relatively hardy. However, it is highly aggressive, extending long sweeper tentacles to vigorously attack surrounding corals, so ample distance from other corals is essential. It grows quickly and frags easily, propagating readily, but managing its aggression is important in the layout. Feeding once or twice weekly promotes growth. Vivid fluorescent-green specimens have high display value and are popular.
Source: Wikipedia (CC BY-SA 4.0)
The Hydnophora (Horn Coral) lives 10+ years.
The Hydnophora (Horn Coral) grows to 10-40cm.
The ideal temperature for the Hydnophora (Horn Coral) is 24〜27℃.
Origin
reef slopes and lagoons of the Indo-Pacific
Lifespan
10+ years
Sources: AlgaeBarn: SPS/LPS care (PAR/flow) / AlgaeBarn: Water Parameters 101
Edited & verified by: BreederDirect editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Scleractinian order (Hydnophora, Merulinidae). CITES Appendix II.
Sources: DOC NZ / CITES-listed corals (Scleractinia spp. = App. II)
Regulations may change. Always verify the latest information with the relevant authorities.
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Size
10-40cm
Temperature
24〜27℃
Photosynthesis + microplankton
Medium to high light. Fluorescence pops under blue LED
It adapts to moderate flow. It spreads in encrusting, massive or branching forms, so allow room for growth when placing it.
Keep the water at 24-27°C. It is fairly hardy, and with stable water quality it grows quickly.
Besides photosynthesis, feeding 1-2 times a week promotes growth. Fine foods such as microplankton suit it.
Fast grower. Regularly frag to control size
Very long sweeper tentacles. Allow ample space around
Intermediate. This is an intermediate-level species. Some prior experience and knowledge of environmental management are recommended.
The ideal temperature for Hydnophora (Horn Coral) is 24〜27℃. Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Hydnophora (Horn Coral) is 10+ years. With proper care and nutrition, they can live a long and healthy life.
Hydnophora (Horn Coral) typically reaches 10-40cm as an adult. Size may vary depending on care conditions and individual genetics.
Hydnophora (Horn Coral) feeds on: Photosynthesis + microplankton. Aim for a balanced diet with appropriate feeding frequency.
The price of Hydnophora (Horn Coral) varies significantly depending on variety, size, and individual quality. Check our market price page for the latest pricing information.
Last updated: June 23, 2026