Montipora digitata

Montipora digitata is a colonial reef-building coral belonging to the family Acroporidae, recognizable by its finger-like, upright branching structures that form dense thickets on reef flats and slopes. Coloration typically ranges from cream and brown to blue, purple, or green, depending on the density of symbiotic zooxanthellae hosted within its tissues. Like other scleractinian corals, it is sessile and relies on a mutualistic relationship with these algae for the majority of its energy needs, supplementing this through the capture of plankton using specialized tentacles.

Its branching architecture provides essential shelter, feeding grounds, and nursery habitat for numerous reef fish and invertebrates, making it an important contributor to overall reef structural complexity.

The species occupies marine neritic waters across a broad swath of the Indo-Pacific, with recorded populations spanning Australia, Japan, Taiwan, China, Southeast Asia, South Asia, East Africa, and numerous Pacific island nations including Fiji, Palau, and the Marshall Islands.

Montipora digitata faces a combination of pressures that have driven its listing as Endangered with a decreasing population trend. Fishing and harvesting activities, recreational reef use, and pollution from agricultural runoff, domestic wastewater, and other sources degrade water quality and physically damage colonies. Invasive species, coral diseases, and outbreaks of native predators such as crown-of-thorns starfish add further stress, compounded by broader habitat alteration linked to changing ocean conditions.

Conservation efforts include its listing under CITES Appendix II, inclusion in marine protected areas across parts of its range, and reef monitoring and restoration programs conducted by regional governments and research institutions. Despite these measures, the species' wide but fragmented distribution and continued exposure to multiple compounding stressors suggest ongoing decline unless water quality and reef management improve substantially.