Largebrain Root Coral

Lobophyllia hemprichii is a large polyp stony coral recognized by its fleshy, meandering valleys and thick, rounded septal walls, which give colonies a brain-like or lobed appearance in shades of green, brown, red, or grey. It is typically found as flabello-meandroid or plocoid colonies and can grow to substantial sizes on reef substrates. Its polyps extend tentacles at night to capture zooplankton, supplementing energy gained from photosynthetic symbiotic algae (zooxanthellae) housed within its tissues.

As a reef-building species, it contributes to structural complexity that provides shelter and habitat for numerous reef-associated fish and invertebrates.

This coral occupies marine neritic waters across the Indo-Pacific, with recorded populations in Australia, Vietnam, Taiwan, China, India, Japan, and Guam, generally inhabiting shallow reef slopes and lagoons.

The species faces a wide array of ongoing pressures. Coastal mining and quarrying degrade reef substrate, while fishing and harvesting activities cause direct physical damage. Recreational activities, including diving and tourism infrastructure, add further stress.

Runoff from agricultural operations and non-timber crop cultivation, combined with domestic wastewater and solid waste pollution, degrades water quality. Disease outbreaks and competition or predation from problematic native species, alongside invasive species, compound these impacts, and broader habitat alteration continues to reduce suitable reef area.

Conservation responses include inclusion in marine protected areas across parts of its range, regulation under international trade frameworks, and ongoing reef monitoring programs. Population trends are documented as decreasing, and the species is currently classified as Endangered, reflecting sustained cumulative pressure from multiple, overlapping anthropogenic threats without clear indication of recovery.