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Siderastrea glynni


Ranked the number 1 EDGE Coral, Siderastrea glynni is the only member of its genus found in the Eastern Pacific and is endemic to a tiny area off the Panamanian coast. This species is currently under revision as it is thought to be a junior synonym of Siderastrea siderea 

Five colonies were discovered in 1992 but no new recordings have since been put forward. Currently, the remaining colonies reside in captivity at the Smithsonian Tropical Research Institute, also in Panama. It is unknown whether additional wild populations of this species remain undiscovered, however fairly rigorous surveying has so far proved unsuccessful. As a result, this coral is considered Critically Endangered. However, it is thought that these colonies resulted from  transferred colonies of Siderastrea siderea in the Caribbean, during the setup of a field experiment early into the 1980s.

  • Order: Scleractinia
  • Family: Siderastreidae
  • Population: Unknown
  • Trend: stable
  • Colony Size: up to 3 meters
  • Depth Range (m): 7 - 9

EDGE Score

EDGE Score: 6.09 (?)
ED Score: 26.57 (?)
GE / IUCN Red List (?)
Not Evaluated Data Deficient Least Concern Near Threatened Vulnerable Endangered Critically Endangered Extinct in the Wild Extinct


This species is endemic to the Pacific coast of Panama and is only known off Uraba Island in Panama Bay.

Habitat and Ecology

Siderastrea glynni is  characterized by its spherical shape and light reddish-brown colour. Known colonies are reported to occur on sand-coral rubble reef slopes to a depth of 8.5m.

Find out more

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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