Leptoseris
Genus
A thin plate-shaped SPS coral from deep waters. Can be placed at tank bottom as it grows in low light.

Names & Synonyms
- CommonLeptoseris
- Commonレプトセリス
Overview
Leptoseris is a genus of plating stony corals (family Agariciidae) native to deeper reef zones of the Indo-Pacific, typically found at 10–100 m depth. Their thin, calcite laminae spread in light-harvesting formations and display subdued tones of brown, green, purple, and pink—some specimens exhibiting striking fluorescence under actinic light. Their deep-water origin grants exceptional tolerance for low light, making them among the rare SPS corals that thrive at 50–150 PAR. Gentle to moderate indirect flow is preferred; direct turbulent flow can damage the delicate skeleton. Stable parameters (24–26°C, KH 8–9, Ca 400–440 ppm) are essential. Growth is slow, and fragging requires care due to plate fragility, placing Leptoseris firmly in the intermediate-to-advanced category.
Care Specifications
| Type | SPS |
|---|---|
| Temperature | 24〜27℃ |
| Specific gravity | 1.023〜1.025 |
| Salinity | 33〜35 ppt |
| KH (carbonate hardness) | 8〜11 dKH |
| Calcium (Ca) | 420〜450 mg/L |
| Magnesium (Mg) | 1300〜1400 mg/L |
| Lighting | Medium |
| Water flow | Medium |
| Placement | Middle |
Care Points
- Lighting—低光量で育つ珍しいSPS
- Notes—水流は弱〜中程度
- Housing—水槽の下部や影になる場所に配置
- Lighting—強い光は白化の原因になる
- Growth—ゆっくり成長する
Regulatory & Conservation
- CITES:
- Appendix II
- Notes:
- イシサンゴ目(Leptoseris, Agariciidae)。CITES 附属書II。
Sources
- AlgaeBarn: SPS/LPS care (PAR/flow)(careSpec)
- AlgaeBarn: Water Parameters 101(careSpec)
- DOC NZ / CITES-listed corals (Scleractinia spp. = App. II)(regulatory)
- Wikipedia(detail)
Related corals of the same type
Blue Coralアオサンゴ(ヘリオポラ)spsIntermediateThe only octocoral with a solid blue skeleton. Taxonomically unique and hardy, but CITES Appendix II — handle with care.
Astreoporaアストレオポラ(スターコーラル)SPSBeginnerA massive SPS in the Acropora family. Named for star-shaped scattered corallites; a hardy entry-level SPS.
AnacroporaアナクロポラSPSIntermediateA branching SPS related to Acropora but lacking axial corallites, forming slender delicate branches with pastel coloration.
IsoporaイソポラSPSIntermediateA branching-to-encrusting SPS formerly placed in Acropora. Bearing multiple axial corallites, it is hardier and easier than Acropora.
CoscinaraeaコスキナラエアSPSBeginnerA hardy coral related to Psammocora with a rough texture. Encrusting, with wide tolerance of light and flow.
Hydnophora (Horn Coral)コモンサンゴspsIntermediateCoral with dense small bumps (hydnophores) on surface. Between LPS and SPS in care. Fast-growing with beautiful fluorescent green. Aggressive — careful placement needed.Related care articles

SPS Coral Infections and Disease Prevention | Distinguishing White Spot Disease, Planula Settlement Disease, and Mixed Infections
When SPS corals contract infections, multiple warning signals appear. The initial sign is fading color and loss of translucency, where healthy specimens lose their transparency and vibrant coloration. White Spot Disease produces numerous microscopic white lesions on the coral's surface, and as the condition progresses, it spreads across the entire body. This is a typical symptom of parasitic or bacterial infection. Another form of infection, Planula Settlement Disease, occurs immediately after larval settlement and causes newly settled small colonies to necrose rapidly.

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As a representative SPS species, Montipora exhibits diverse growth forms that differ from Acropora, another SPS type. This article explains the characteristics of each form—digitate, plate, and encrusting—and how to optimize light, water flow, and nutrient environments for each.
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