Montipora spumosa

Montipora spumosa is a colonial stony coral in the family Acroporidae, typically forming encrusting to submassive growths with a finely textured surface pierced by numerous small polyps. Like other scleractinians, its colonies are built from calcium carbonate skeletons secreted by individual polyps, which extend at night to capture plankton while also deriving energy from photosynthetic zooxanthellae housed within their tissues. This symbiosis allows the coral to contribute to reef framework construction, providing three-dimensional habitat structure that supports fish and invertebrate communities.

The species occurs in shallow marine neritic waters across the Indo-Pacific, with recorded populations in Australia, Thailand, Vietnam, Taiwan, China, and Japan. It typically inhabits reef flats and slopes within photic depths suitable for its symbiotic algae.

Montipora spumosa is classified as Endangered, with a decreasing population trend. Threats include destructive fishing and harvesting practices, physical damage from recreational activities such as diving and anchoring, and increased disease prevalence linked to both invasive species and native pathogens. Water quality degradation from domestic and urban wastewater, agricultural runoff, and other pollution sources exacerbates coral stress and reduces resilience.

Habitat alteration, including coastal development and shifting sedimentation patterns, further diminishes suitable substrate, while expanding agricultural land use compounds runoff-related impacts.

Conservation efforts for reef-building corals in this region generally include marine protected area designations, water quality regulation, restrictions on destructive fishing gear, and coral restoration or transplantation programs in some countries. Region-specific monitoring under Red List assessments tracks population changes over time.

Given the combination of chronic pollution, physical disturbance, and disease pressure across its range, the species' outlook remains poor without sustained reductions in cumulative stressors affecting reef ecosystems.