Micromussa (Micro Lord)
Micromussa amakusensis · also called Micro Lord, Acan Micromussa, Micro Acan, Micromussa Lord
Micromussa amakusensis (formerly placed in Acanthastrea, and previously known as Acanthastrea bowerbanki) is a small-polyp LPS prized for intensely fluorescent, multicolor corallites. It is a hardy, slow-growing reef coral well suited to intermediate hobbyists keeping low-to-moderate light and gentle flow. The 'Micro Lord' trade name is widely applied, though it historically referred to the related Micromussa lordhowensis.
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Quick facts
| Size | Encrusting/plating colonies of small fleshy polyps; corallites roughly 5-10 mm each, colonies commonly 3-15 cm across in aquaria |
| Lifespan | 10–50 years |
| Social needs | solo |
| Native region | Indo-Pacific reefs (Japan/Amakusa region, Western Pacific and broader Indo-Pacific) |
| Origin | Old World |
| Climate | 🌴 Tropical |
| Water type | 🌊 Marine |
| Family | Lobophylliidae |
| Genus | Micromussa |
Part of the LPS Corals
Large-polyp stony corals (brains, Euphyllia, Goniopora, Scolymia, Lobophyllia, Favites, Acan, Dendro, Octospawn) with fleshy polyps over a calcium-carbonate skeleton. Intermediate-care reef corals that appreciate moderate light/flow and direct feeding.
Habitat & space requirements
From the minimum an animal needs to be kept humanely, up to the ideal setup. Bigger is almost always better — minimums are floors, not targets.
Life & growth stages
How this animal changes through its life — each stage often has its own care, diet and space needs.
Color & pattern variants
Natural variants occur in the wild; selectively bred (man-made) variants were developed in captivity.
Rainbow Micromussa
Highly sought morphs showing multiple contrasting colors (green/red/orange/blue) across the corallite, mouth, and wall. Naturally occurring color forms selectively propagated in the hobby.
Bleeding Apple / Red-mouth Lord
Deep red or maroon corallites with brightly contrasting green or orange centers; a classic Micro Lord look named for the rich red coloration.
Master / Ultra Lord
Trade names for exceptionally vivid, high-contrast color combinations; not distinct species but premium naturally colored selections grown out as named aquacultured lines.
UFO Micro Lord →
A classic small-polyp Micro Lord with brick-red septal striping and, most distinctively, a vividly contrasting oral disc that glows yellow (sometimes green) like a little flying saucer at the center of each polyp.
Tip: Give it lower light and low-to-medium alternating flow; too much intensity can wash the trademark yellow oral disc toward a flat red, so keep it shaded on the sandbed or lower rockwork. These corals shift color quickly with lighting changes.
Rainbow Micromussa (Rainbow Acan Lord) →
The catch-all Aussie-import rainbow Micro Lord: fat fleshy polyps splashing through red, orange, yellow, green, and blue across a single oral disc. These are the funky multicolor *Micromussa lordhowensis* (formerly *Acanthastrea lordhowensis*) pieces commonly called 'Acan Lords' or just 'Lords.'
Tip: Place under a bluer spectrum at moderate PAR; a stronger blue light helps hold the rainbow coloration, whereas hot white-heavy light tends to morph it toward dominant red/orange. Leave space between colonies, as Micromussa have a strong sting.
ECC Rainbow Road →
A standout designer Micro Lord with orange mouths shot through with blue patterning, wrapped in a mantle of concentric green, yellow, and red rings. A high-end collector rainbow that commands premium per-head pricing.
Tip: Treat it as a low-light, low-flow gem: keep it on the sandbed or a shaded ledge so the orange-and-blue oral disc stays bright, and spot-feed occasionally to keep heads plump and dividing.
Cherry Limeade Rainbow Micromussa →
A dessert-named rainbow Micro Lord with a cherry-red base that fades into a pink outer layer, then transforms into a bright orange-and-blue rim. Notable for exceptionally large, fleshy polyps.
Tip: Give it the standard Micro Lord placement of lower light and gentle flow on the sandbed; the big polyps respond well to occasional target feeding, which speeds new head budding.
Raging Storm Micromussa →
A bright two-tone Micro Lord ('Acan lord') morph dominated by vivid orange polyps with teal/green accents, sold as an aquacultured, quarantine-protected frag.
Tip: Low light, low flow, sandbed placement is ideal; this is a forgiving LPS that feeds readily, so the occasional meaty target feeding helps it spread.
Holy Grail Micromussa →
The iconic blue-light showpiece of the Micro Lord world: a glowing lime-yellow oral disc ringed by deep blue, then bands of lime-green and yellow, finished with a wide cherry-red outer ring. Often called the industry's top aquacultured LPS for its jewel-like, rainbow-ringed polyps.
Tip: Keep it on the sandbed or a low rock shelf under modest light (~100-150 PAR) with gentle, indirect flow so the polyps inflate fully and the colors stay saturated rather than browning out. Target-feed a small amount of meaty frozen food about once a week.
TSA Freak Show Micromussa →
A vendor-branded rainbow Micro Lord in the high-color 'freak show' tier, with bold multicolor polyps in the red/orange/green/blue range typical of top-shelf designer Micromussa.
Tip: Keep it on the lower third of the tank under softer light (~150 PAR) with gentle alternating flow; like other Micro Lords it shows best color and fullest polyp extension out of direct high-intensity light.
Jason Fox Holy Grail Micromussa →
A Jason Fox signature offering of the Holy Grail Micro Lord (*M. amakusensis*) showing striking concentric rings from the center out: neon green, then bright purple-green, into orange and red, finished by a ring of light blue, with polyps about half an inch across.
Tip: Medium-low to medium light (roughly 80-250 PAR) and low-to-medium flow keeps the tight color rings crisp; avoid blasting flow directly at the fleshy polyps, which can prevent full inflation.
Mardi Gras Acan (TSA Psycho Troll) →
A festive multicolor Micro Lord in TSA's signature tier, with carnival-bright polyps mixing greens, oranges, reds, and blues. Frags run roughly three-quarter to one inch from the mother colony.
Tip: Keep it shaded and low in the tank with mild alternating flow; consistent moderate light prevents the brighter accent colors from bleaching toward solid red.
Habitat & enclosure
Substrate
Equipment & setup
Diet
Behavior & temperament
Health
Tips, DIY & hacks
Sources
- Corals: A Quick Reference Guide (Julian Sprung) (reference)
- WoRMS - Micromussa amakusensis (Veron, 1990) (database)
- Reef2Reef - Micromussa/Acan Care (care guide)