Pocillopora acuta

Pocillopora acuta is a stony coral in the family Pocilloporidae, recognized by its compact, branching colonies with thin, upright stalks tipped with verrucae (small wart-like projections) that house polyps. Like other scleractinian corals, it builds a calcium carbonate skeleton and relies on a symbiotic relationship with photosynthetic algae (zooxanthellae) housed in its tissues for the majority of its energy needs. It also feeds opportunistically on plankton captured with its tentacles.

As a reef-building species, it contributes structural complexity to reef systems, providing shelter and habitat for fish, invertebrates, and other reef organisms.

The species occupies shallow marine neritic waters across the Indo-Pacific, with recorded populations in Australia, the Philippines, Madagascar, Indonesia, Singapore, Thailand, Taiwan, the United States, China, and Japan. It typically inhabits reef flats, lagoons, and upper reef slopes where light penetration supports its symbionts.

Populations are in decline due to a combination of pressures. Disease outbreaks, exacerbated by stress from other factors, affect colony survival. Agricultural runoff introduces nutrients and sediments that degrade water quality and promote algal overgrowth, reducing coral cover. Habitat alteration, including shifts in reef structure and condition linked to broader environmental change, further limits suitable settlement and growth areas for new colonies.

Conservation responses include marine protected area designations across parts of its range, coral restoration and propagation programs, water quality monitoring, and research into disease resistance and thermal tolerance. Regional reef management initiatives aim to reduce local stressors such as pollution and sedimentation.

Given ongoing habitat degradation and disease pressure, the species' population trend remains decreasing, and its long-term outlook depends heavily on the success of water quality management and broader reef conservation efforts across its range.