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Seriatopora stellata

Declining

Overview

Seriatopora stellata is a stony coral in the family Pocilloporidae, recognized by its finely branching, thin-stemmed colonies that give rise to dense, brush-like structures on the reef substrate. Like other scleractinian corals, it relies on symbiotic algae (zooxanthellae) housed within its tissues for the majority of its energy needs, while also capturing plankton with its polyps. Its branching architecture provides shelter and habitat complexity for small reef fish, crustaceans, and invertebrates, contributing to overall reef structural diversity.

The species occurs in marine neritic waters across parts of the western Pacific and eastern Indian Ocean, with confirmed records in New Caledonia, Australia, Vietnam, Japan, and China. It inhabits shallow coral reef environments typical of the region.

Its Endangered status and declining population trend stem from a combination of pressures. Fishing and harvesting activities, along with recreational reef use, cause direct physical damage to colonies. Disease outbreaks and pressure from problematic native species compound these effects.

Water quality degradation from domestic and urban wastewater, agricultural runoff, and effluents from non-timber crop production contribute to reef stress and reduced coral resilience. Broader habitat alteration, including shifts linked to changing ocean conditions, further undermines colony survival, and additional unrecorded pollution sources add to cumulative stress.

Conservation of this species occurs primarily through broader reef protection frameworks, including marine protected areas within its range states and regional coral reef monitoring programs that track colony health and cover. No species-specific recovery program has been documented.

Given the ongoing, multi-source nature of the threats affecting its habitat and the continuing population decline, the species' outlook remains concerning, with survival closely tied to the trajectory of regional reef ecosystem health and water quality management.

This coral species faces harm from fishing activities, tourism and recreation, and pollution from sewage and agricultural runoff washing into its ocean habitat, as well as harmful invasive species and disease outbreaks. Changes to its reef habitat, along with unclear pollution sources, further put pressure on its survival. All of these threats are currently ongoing, suggesting the situation is not improving and the coral remains under sustained pressure.

Threat summary

Habitat

Marine neritic· major

Conservation measures underway

Habitat & natural process restorationSpecies recoveryLegislation

Frequently asked questions

Why is Seriatopora stellata classified as Endangered?
Seriatopora stellata is classified as Endangered — facing a very high risk of extinction in the wild — because population numbers are declining steeply and key habitats are under sustained pressure. This coral species faces harm from fishing activities, tourism and recreation, and pollution from sewage and agricultural runoff washing into its ocean habitat, as well as harmful invasive species and disease outbreaks. Changes to its reef habitat, along with unclear pollution sources, further put pressure on its survival. All of these threats are currently ongoing, suggesting the situation is not improving and the coral remains under sustained pressure.
Where does Seriatopora stellata live?
Seriatopora stellata occurs in Australia, China, Japan, New Caledonia, and Vietnam. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Seriatopora stellata?
The main threats to Seriatopora stellata are 11.1, 2.1, 5.4, and 6.1. The full IUCN-classified threat record for this species is detailed on the species page.

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