Alveopora marionensis

Alveopora marionensis is a colonial stony coral distinguished by its perforate skeletal structure and polyps bearing characteristically twelve tentacles, a trait that separates the genus Alveopora from closely related Acroporidae members. Colonies typically form encrusting to massive shapes, contributing to the three-dimensional framework of reef habitats. Like other reef-building corals, it hosts symbiotic zooxanthellae within its tissues, relying on photosynthesis for much of its energy while also capturing plankton through polyp feeding.

Its calcium carbonate skeleton contributes to reef accretion, supporting the broader community of invertebrates and fish that depend on reef structure for shelter and feeding grounds.

The species occurs in shallow tropical marine waters across the Indo-Pacific, with recorded populations in Australia, Indonesia, Vanuatu, Yemen, Vietnam, and India. It is generally associated with coral reef environments in coastal and lagoon settings.

Its decline stems from a combination of pressures: destructive fishing and harvesting practices, physical damage from recreational activities such as diving and boating, and outbreaks of coral disease and predatory native species like crown-of-thorns starfish. Water quality degradation from domestic wastewater, agricultural runoff, and sediment linked to non-timber crop cultivation exacerbates stress on colonies, while broader habitat shifting driven by climate-related changes compounds these impacts. Invasive species further disrupt reef ecosystems where this coral occurs.

Conservation efforts are largely embedded within regional marine protected area networks and international reef monitoring frameworks, alongside restrictions on destructive fishing gear in some range states. Water quality management initiatives in agricultural and coastal zones offer partial mitigation. Despite these measures, population trends remain downward, and the species is currently assessed as Endangered, reflecting ongoing habitat degradation and cumulative environmental stressors across its range.