Acropora Humilis Care Guide
Acropora humilis · Saltwater SPS Coral
What Acropora Humilis look like
Acropora humilis is a small to medium-sized stony coral characterized by its bushy, branching structure, which can reach a maximum adult size of approximately 30 centimeters in height. The branches are typically slender and cylindrical, with a tendency to form dense clusters. This species exhibits minimal sexual dimorphism, as both male and female polyps share similar morphological traits. A distinctive feature of A. humilis is its prominent axial corallites, which are larger than the radial corallites, giving the coral a unique appearance. The corallites are often surrounded by a smooth, glossy surface, and the coloration can vary widely, ranging from pale blue to vibrant green or brown, depending on the environmental conditions and symbiotic zooxanthellae present. Defensive adaptations include the presence of nematocysts within the polyps, which can deliver a mild sting to deter potential predators.
Behavior & temperament
A. humilis exhibits a predominantly colonial behavior, forming extensive thickets in reef environments. It is typically found in shallow waters, where it thrives in high-light conditions. The coral extends its polyps primarily during the night for feeding, utilizing its nematocysts to capture plankton and other small particles from the water column. This species is known to engage in aggressive interactions with neighboring corals, often using its stinging cells to compete for space and resources. A. humilis does not exhibit significant movement but can expand and contract its polyps to optimize feeding and respond to environmental stimuli.
Diet & feeding
Acropora humilis is primarily a photosynthetic coral, relying on symbiotic zooxanthellae for energy, but it also captures zooplankton and particulate organic matter from the water column. In captivity, it requires strong lighting and may benefit from supplemental feeding with microplankton or coral-specific foods.
Behind the name
The genus name 'Acropora' is derived from the Greek words 'akron' meaning 'top' or 'summit' and 'pora' meaning 'porous', referring to the porous structure of the coral. The species name 'humilis' is Latin for 'lowly' or 'humble', likely referencing its growth form.
Plan your tank
Check the numbers before you buy: tank volume, salinity, salt mix, water changes, and your ongoing care routine.
Keeping Acropora Humilis?
AquaLens identifies your fish and plants from a photo, tracks water chemistry, and flags health issues early — free on iOS and Android.
