Acropora granulosa

Acropora granulosa is a stony coral within the family Acroporidae, distinguished by its branching skeletal structure built from calcium carbonate secreted by colonial polyps. Like other Acropora species, it relies on symbiotic algae (zooxanthellae) housed within its tissues for the majority of its energy needs, while also capturing plankton using specialized stinging cells. Colonies contribute to the three-dimensional framework of coral reefs, providing structural habitat for fish and invertebrate communities and supporting broader reef productivity through calcification and nutrient cycling.

This species occupies shallow marine neritic waters across the Indo-Pacific, with confirmed distribution in Australia, Vietnam, China, Japan, and Palau. It typically inhabits reef environments where light penetration supports its photosynthetic symbionts.

The species faces a combination of pressures common to reef-building corals in the region. Agricultural runoff and effluents, along with domestic and urban wastewater discharge, degrade water quality and promote algal overgrowth. Fishing and harvesting activities, alongside recreational use of reef areas, cause physical damage to colonies.

Invasive species and disease outbreaks, including pressure from native predators such as crown-of-thorns starfish, further stress populations. Habitat alteration linked to coastal development and broader environmental shifts, including warming and acidifying waters, compounds these threats.

Conservation efforts targeting this species largely fall under broader regional reef protection frameworks, including marine protected areas across its range states, water quality regulations, and monitoring programs tracking coral cover and bleaching events. Population trends indicate an ongoing decline, and the species is currently classified as Vulnerable. Without substantial reduction in cumulative local and global stressors, continued decline is anticipated across its range.