Can beginners keep this coral?

This species is generally considered suitable for advanced aquarists. Since stable lighting, flow, and water quality are essential, it's best to gain experience with Acropora corals before adding this one.

How large does the colony eventually get?

The colony can grow to just under 1 meter across. Since it spreads horizontally rather than upward, it's a good idea to leave plenty of open space around it when placing it.

Where in the tank should it be placed?

Given its natural habitat at 8-40m, placing it a bit below the tank's strongest-light zone, in a spot with even flow reaching all sides, tends to work well.

Is this species subject to CITES?

Acropora Granulosa is listed in CITES Appendix II. International trade requires a permit from the exporting country, but as far as CITES is concerned, no registration is needed to buy or sell individuals already legally in Japan.

Can it be kept alongside other corals?

Because it eventually spreads out into a wide, flat plate, keeping it with other corals is fine as long as there's enough distance to prevent future contact. Plan your layout with its mature size in mind.

Acropora Granulosa

Acropora Granulosa is a distinctive stony coral that grows as a flat, plate-like colony under 1 meter across, with short, slanted branchlets spread evenly over its horizontal surface. Its radial corallites are small and pocket-shaped, giving the colony a fine, tidy texture. Coloration leans toward soft pale blue, cream, or gray tones, and the overall silhouette reads as understated but striking underwater. In the wild it's typically found in deeper water, roughly 8 to 40 meters down, and recreating those conditions calls for real experience — this is considered an advanced-level coral for the reef aquarium.

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Acropora Granulosa key facts

Care level: Advanced
Size: Colonies under 1 m in diameter
Temperature: 24〜27℃
Diet: Mainly nutrition from symbiotic zooxanthellae, supplemented with powdered or liquid coral foods and phytoplankton.
Lighting: It needs strong light, but in the wild it lives relatively deep at 8-40 m, so acclimate it to intense lighting over an extended period.
Flow & Placement: It grows as a single horizontal plate, so choose a position where it will not shade the corals beneath it, and make sure flow reaches the underside.
Water Temperature & Quality: Water 22-26C, specific gravity 1.023-1.025, KH 8-12, calcium 380-440 ppm, magnesium 1300-1400 ppm. Sudden swings in alkalinity are the most common cause of tissue loss.
Feeding: Most of its nutrition comes from photosynthesis by its zooxanthellae. Powdered or liquid coral foods and phytoplankton can be offered as a supplement, but stable light and water chemistry matter more than feeding.
Notes: No closely similar species is known, which makes identification straightforward. The IUCN rates it Vulnerable. Listed on CITES Appendix II, so international trade requires permits.

TraitsSPSAcroporaPlatingCITES II

About Acropora Granulosa

A stony coral forming flat, plate-like colonies under 1m across, with short branchlets and small pocket-shaped corallites in pale blue, cream, and gray tones. Naturally found in deeper reef zones (8-40m); considered suitable for advanced aquarists.

7 things to know before welcoming a Acropora Granulosa

1Place it at depth
In the wild this species grows at 8-40m, deeper than many other Acropora and away from constant surface-intensity light. In the aquarium, start it in the mid-water column or a slightly shaded position rather than directly under the strongest lighting, and acclimate it gradually.
2Flow across the plate
Because the colony spreads as a flat, horizontal plate rather than growing upward, detritus can settle on the surface if flow doesn't reach every part of it evenly. Aim for randomized, multidirectional flow from your pump placement.
3Growth spreads outward
This coral grows outward into a flat plate up to about 1 meter across rather than branching upward. Leave generous space around it when placing the frag so neighboring corals aren't crowded as it expands.
4Watch the branchlets
A healthy colony keeps color and tissue intact right to the tips of its short, angled branchlets. Check regularly for polyp extension, bleaching, or tissue recession at the branch tips as part of routine maintenance.
5Best for experienced keepers
Lighting, flow, and water quality all need to stay stable, which is why this species is considered suitable for advanced aquarists. It's best added to a tank with prior Acropora-keeping experience and an already stable, mature system.
6Muted, natural tones
Coloration runs toward soft pale blue, cream, and gray rather than bright fluorescent shades. How the color reads can shift with lighting and nutrient levels, so give it time to settle in before judging its final appearance.
7Sensitive to sudden shifts
Like other Acropora, this species can be stressed by sudden changes in temperature, salinity, or water chemistry. Take extra care with acclimation right after introduction, and keep water parameters consistent for long-term success.

Frequently asked questions about Acropora Granulosa

Q.Can beginners keep this coral?: A.This species is generally considered suitable for advanced aquarists. Since stable lighting, flow, and water quality are essential, it's best to gain experience with Acropora corals before adding this one.
Q.How large does the colony eventually get?: A.The colony can grow to just under 1 meter across. Since it spreads horizontally rather than upward, it's a good idea to leave plenty of open space around it when placing it.
Q.Where in the tank should it be placed?: A.Given its natural habitat at 8-40m, placing it a bit below the tank's strongest-light zone, in a spot with even flow reaching all sides, tends to work well.
Q.Is this species subject to CITES?: A.Acropora Granulosa is listed in CITES Appendix II. International trade requires a permit from the exporting country, but as far as CITES is concerned, no registration is needed to buy or sell individuals already legally in Japan.
Q.Can it be kept alongside other corals?: A.Because it eventually spreads out into a wide, flat plate, keeping it with other corals is fine as long as there's enough distance to prevent future contact. Plan your layout with its mature size in mind.