Lithophyllon repanda

Lithophyllon repanda is a species of stony coral in the family Fungiidae, known for its flattened, encrusting to sub-massive growth form with distinctive radiating septa visible across its surface. Like other scleractinian corals, it builds a calcium carbonate skeleton and hosts symbiotic zooxanthellae, which supply the coral with energy through photosynthesis in exchange for shelter. Colonies contribute to the physical structure of reef habitats, providing surface area and microhabitat complexity that supports associated invertebrate and fish communities.

The species inhabits shallow marine neritic waters and is found across a broad Indo-Pacific range, with confirmed occurrence in Australia, Thailand, Taiwan, China, and Japan. It typically occurs on reef flats and slopes where light penetration supports its photosynthetic symbionts.

The species faces a wide array of ongoing pressures. Coastal development and urban expansion degrade nearshore reef habitat, while land-based pollution—domestic wastewater, agricultural runoff, and solid waste—reduces water quality. Fishing and harvesting activities, along with recreational use of reef areas, cause direct physical damage.

Coral disease, competition or predation from problematic native species, and impacts from invasive species add further biological stress. Storms and flooding events, intensified by broader climate-driven habitat shifting, cause episodic destruction, compounding the effects of chronic disturbance.

Conservation efforts rely primarily on broader marine protected area networks and reef management programs across its range countries, including water quality regulation and fisheries controls, though species-specific interventions for Lithophyllon repanda are limited. Population trends are documented through regional reef monitoring under IUCN assessment frameworks.

The population is currently assessed as Endangered with a decreasing trend. Given the persistence and multiplicity of ongoing threats, the species' outlook remains unfavorable without substantial improvements in regional reef protection and water quality management.