Montipora angulata

Montipora angulata is a colonial reef-building coral in the family Acroporidae, forming encrusting to plate-like or columnar colonies with a finely textured surface typical of the genus. Like other scleractinian corals, it relies on symbiotic zooxanthellae for the bulk of its energy needs while also capturing plankton with small polyps. Its calcium carbonate skeleton contributes to reef framework construction, providing structural habitat for fish and invertebrates and supporting broader reef biodiversity.

The species has a wide Indo-Pacific distribution, occurring in marine neritic waters across Australia, Japan, Taiwan, China, Indonesia, Malaysia, the Philippines, Vietnam, Thailand, India, Papua New Guinea, the Solomon Islands, Fiji, New Caledonia, Palau, the Marshall Islands, American Samoa, and the Cocos (Keeling) Islands. It inhabits shallow reef environments typical of the region.

Population numbers are not precisely quantified, but the trend is assessed as decreasing, and the species is listed as Endangered. Threats include destructive and incidental fishing and harvesting practices, damage from recreational activities, and broader ecosystem modification. Coral disease and problematic native species, together with invasive species, add further pressure.

Water quality degradation from domestic and urban wastewater, agricultural runoff, and solid waste contributes to reef stress, compounding impacts from habitat shifting linked to environmental change.

Conservation measures include the species' listing on the IUCN Red List, inclusion in CITES Appendix II trade regulations affecting stony corals, and protection within marine protected areas across parts of its range, alongside regional reef monitoring and water quality management programs.

The overall outlook remains concerning. Continued exposure to multiple, overlapping stressors across a wide but fragmented range suggests ongoing decline unless local water quality and habitat pressures are substantially reduced.