Favites valenciennesii

Favites valenciennesii is a reef-building coral in the family Merulinidae, recognizable by its large, fleshy polyps and massive, boulder-like colonies arranged in tight, angular corallites. Like other scleractinian corals, it relies on symbiotic zooxanthellae for the majority of its energy needs, with the algae providing photosynthetic products in exchange for shelter and access to sunlight. The coral extends its polyps at night to capture zooplankton, supplementing its nutritional intake.

As a framework-building species, it contributes to the physical structure of reef habitats, providing shelter and substrate for numerous other marine organisms.

This species inhabits shallow, rocky and marine neritic environments across the western Pacific, with recorded populations in Australia, Thailand, Vietnam, Taiwan, China, and Japan. It typically occurs on reef slopes and other hard-bottom substrates within photic depths suitable for its symbiotic algae.

The species faces a broad array of ongoing pressures. Coastal mining and quarrying degrade reef substrate, while fishing and harvesting activities cause direct physical damage. Recreational use, including diving and boating, adds further stress.

Water quality is compromised by domestic and urban wastewater, agricultural runoff, and other pollution sources, while invasive species and disease outbreaks affect coral health directly. Habitat shifting linked to broader environmental change and coastal urban development compound these impacts.

Conservation efforts include marine protected areas within parts of its range, water quality management programs, and international monitoring under the IUCN Red List framework, which currently lists the species as Endangered.

Given the number and persistence of concurrent threats, the population trend is decreasing, and the species' long-term outlook remains concerning without substantial reductions in coastal pollution, habitat degradation, and unsustainable resource use.