Alveopora gigas

Alveopora gigas is a colonial stony coral in the family Acroporidae, distinguished by large, fleshy polyps with twelve tentacles each, arranged over a porous skeletal framework. Unlike many reef-building corals, Alveopora species lack true septa in the traditional sense, relying instead on their distinctive perforate structure. Colonies form massive or sub-massive growth patterns that contribute to the physical architecture of reef systems, offering shelter and substrate for associated invertebrates and fish.

Like other scleractinian corals, it hosts symbiotic zooxanthellae, algae that supply the coral with photosynthetic energy in exchange for a protected habitat.

The species occurs across a broad but fragmented range in the Indo-Pacific, including Australia, Myanmar, the Seychelles, the Philippines, Hong Kong, Indonesia, Brunei, China, and Fiji, inhabiting shallow marine reef environments.

Its decline is driven by a wide array of overlapping pressures. Coastal mining and quarrying degrade reef substrate, while fishing and harvesting activities cause direct physical damage and disturbance. Recreational use of reef areas adds further stress, compounded by pollution from urban wastewater and agricultural runoff, which reduces water quality and promotes algal overgrowth.

Habitat alteration, invasive species, disease, and outbreaks of problematic native species such as coral-eating starfish add additional mortality pressure.

Conservation responses include inclusion in marine protected areas across parts of its range, international trade regulation, and ongoing population monitoring by regional reef research programs. Broader coral reef management initiatives addressing water quality and fisheries also indirectly benefit the species.

Given the combination of chronic pollution, habitat degradation, and climate-linked stressors affecting reef ecosystems generally, the population trend remains decreasing, and the species' long-term outlook remains concerning without sustained, coordinated reef protection efforts.