Acan Lord Coral
Micromussa lordhowensis
Also known as Acan, Micromussa lordhowensis, Acanthastrea lordhowensis, Lord Coral
Care at a glance
- Temperature
- 75–81°F (24–27°C)
- pH
- 8.1–8.4
- Adult size
- 5.9 in (15 cm)
- Minimum tank
- 11 gal (40 L)
- Temperament
- Mostly peaceful
- Social behavior
- Solitary
- Swim level
- Bottom
- Difficulty
- Medium
- Breeding
- Medium
- Rarity
- Common
- Reef safe
- Reef safe
- Origin
- Australia and the western Pacific
- Family
- Lobophylliidae
Overview
A moderately aggressive but manageable LPS that can extend feeder tentacles and sting corals placed right against it, so give it a few inches of space. It responds dramatically to feeding with mysis, brine or coral foods once or twice a week, showing better color and faster growth. Prized for its color morphs and easily fragged polyp by polyp.
In the wild
Acan Lords come from reefs around Australia and the western Pacific and form encrusting mats of rounded, fleshy polyps in bright, high-contrast color combinations that make them one of the most collected LPS. They prefer lower light around 50 to 100 PAR and low to moderate indirect flow, since too much light bleaches them and too much flow keeps the polyps retracted. Place them on the sandbed, lower rock or a shaded overhang at 24 to 27 C and pH 8.1 to 8.4.
Good to know
Long known as Acanthastrea lordhowensis, this coral was reclassified in 2016 as Micromussa lordhowensis, though the trade name Acan stuck. It is a large polyp stony coral in the family Lobophylliidae that grows by adding new polyps to the mat. It is photosynthetic but a strong feeder that extends feeder tentacles at night.
Did you know
Single Acan polyps of rare color morphs have sold for eye-watering prices, making a fist-sized colony worth more per square inch than almost any other coral in the hobby.
Where to buy
Some links may not be the exact species or variety.
- LiveAquaria Freshwater and saltwater fish, inverts and corals
- Saltwaterfish.com Marine fish, corals and inverts shipped overnight
- AlgaeBarn Copepods, macroalgae and captive-bred marine livestock
- Biota Captive-bred marine fish, corals and clams shipped direct
…or ask your local fish store.
Appears in
Keeping Acan Lord Coral?
Track water tests, reminders and stocking fit.
Related species

Scoly Coral
Homophyllia australis5.1 in (13 cm)11 gal (40 L)75–81°F (24–27°C)
Acan Coral
Acanthastrea echinata7.9 in (20 cm)11 gal (40 L)75–81°F (24–27°C)
Blastomussa
Blastomussa merletti5.9 in (15 cm)11 gal (40 L)75–81°F (24–27°C)
Donut Coral
Acanthophyllia deshayesiana9.8 in (25 cm)11 gal (40 L)75–81°F (24–27°C)
Lobed Brain Coral
Lobophyllia9.8 in (25 cm)20 gal (75 L)75–81°F (24–27°C)Grooved Brain Coral
Lobophyllia recta9.8 in (25 cm)26 gal (100 L)75–81°F (24–27°C)
