Rainbow Tenuis Acropora
Rainbow Tenuis Acropora
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Description
Description
Rainbow Tenuis Acropora Coral Frag
The Rainbow Tenuis Acropora is one of the most sought-after designer SPS corals, prized for its intense multi-colouration, fine branching structure, and exceptional fluorescence. Displaying a vibrant blend of blues, greens, yellows, and pinks across its branches and growth tips, this coral delivers true show-stopping colour in mature reef systems.
Highly favoured by SPS collectors, Rainbow Tenuis is considered a centrepiece coral—rewarding stable, well-maintained aquariums with unmatched colour depth and visual complexity.
Natural Habitat & Distribution
Acropora corals originate from the Indo-Pacific region, with natural populations 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, Acropora tenuis inhabits shallow reef crests and upper reef slopes, where it receives intense sunlight and strong, turbulent water movement. These conditions directly inform its care requirements in captivity.
A Brief History
Acropora tenuis has long been recognised as a premium SPS species due to its fine branch structure and colour potential. As reef-keeping techniques and lighting technology advanced, Rainbow Tenuis variants emerged as some of the most visually impressive corals in the hobby.
Today, Rainbow Tenuis Acropora is regarded as a benchmark designer coral, often featured in high-end SPS collections and competition-level reef displays.
Appearance & Growth
Classified as an SPS (Small Polyp Stony) coral, Rainbow Tenuis develops a refined, upward-branching growth form with tightly spaced branches and pronounced axial tips.
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Multi-coloured branches and growth tips
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Intense fluorescence under blue lighting
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Fine polyp structure with strong extension
Growth is moderate to fast in stable reef systems, with colour improving as the coral matures.
Placement & Lighting
Rainbow Tenuis Acropora performs best under high lighting, closely replicating its natural reef-crest environment.
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Lighting: High
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Best placed in the upper regions of the aquarium
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Lower light may reduce colour saturation
Flow Requirements
Provide strong, random, turbulent flow to support healthy tissue, enhance colouration, and encourage even branch development. Avoid direct laminar blasts aimed at the coral.
Water Chemistry
Acropora tenuis requires exceptionally stable water parameters. Maintain consistent levels of:
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Calcium
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Alkalinity
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Magnesium
Along with stable nutrients and balanced trace elements. Automated dosing and frequent testing are strongly recommended.
Feeding
Primarily photosynthetic, Rainbow Tenuis benefits from occasional supplemental feeding, including:
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Fine powdered coral foods
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Amino acids
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Micro-plankton blends
These supplements can help maintain colour vibrancy and support steady growth when used sparingly.
Temperament & Spacing
Acropora corals are generally peaceful, but Rainbow Tenuis requires ample spacing to prevent contact with neighbouring SPS corals as it expands.
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 colour balance and branch structure depending on lighting and tank conditions.
Care Summary
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Care Level: Advanced
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Flow: High
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Lighting: High
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Temperament: Peaceful
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WYSIWYG
Every featured frag is photographed individually, so the coral you see is exactly the one you’ll receive. No stock images, no substitutions — just honest, WYSIWYG frags grown and cared for in our systems.