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8. Stylocoeniella cocosensis


Stylocoeniella cocosensis is a widespread but rare coral with a preference for shallow waters and rocky overhangs.

It is limited to a depth range of just 10m where colonies can reach 10cm in diameter. This species is particularly susceptible to coral bleaching and disease due to its restricted depth range and also suffers from extensive reduction of suitable reef habitat.

Although resident in regions of high human impact, there has been little research to identify the threats facing this species.

  • Order: Scleractinia
  • Family: Astrocoeniidae
  • Trend: unknown
  • Colony Size: up to 10cm
  • Depth Range (m): 2 - 10

EDGE Score

EDGE Score: 4.41 (?)
ED Score: 19.52 (?)
GE / IUCN Red List (?)
Not Evaluated Data Deficient Least Concern Near Threatened Vulnerable Endangered Critically Endangered Extinct in the Wild Extinct


This coral is found in tropical waters across the central Indian and Pacific Oceans including around remote islands such as Christmas and Cocos islands.

Habitat and Ecology

Very little is known about the ecology of this reef building coral. It occurs in shallow reef environments down to a depth of 10m, where S.cocosensis is known to prefer the shelter of overhangs and crevices in the upper fore reef.

As with most hard corals, this species is a zooxanthellate organism meaning that it houses a small photosynthetic algae (zooxanthellae) through which it obtains energy.

Find out more

Loading species distribution map...

This wordcloud illustrates the threats facing this species. The size of each word indicates the extent of a species range that is affected by that threat (larger size means a greater area is affected). The colour of the word indicates how much that threat impacts the species (darker shades of red mean the threat is more severe).

Urban development Industrial development Tourism Extreme temperatures Extreme weather Shipping Fishing Recreation Invasive species Native species Wastewater Industry Agriculture Air pollution

Threat wordcloud key:

Small area affected
Large area affected
Least severe
Most severe
Severity unknown
Source: The IUCN List of Threatened Species. Version 2017.1.
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