Grey Reef Shark
Carcharhinus amblyrhynchos
Sighting evidence at Blue Hole, Kosrae
Photo: Luis P. B. · CC BY-NC
Grey reef sharks congregate along the outer wall adjacent to Kosrae's Blue Hole, drawn by the upwelling nutrients that concentrate prey in the thermocline zone. Kosrae's low fishing pressure means these sharks retain their natural, unhurried behaviour — they cruise at recreational depth well within camera range rather than retreating as is common at more visited sites. Divers ascending the outer wall at the end of the dive frequently count five or more individuals simultaneously.
Evidence at this site
No confirmed records on file at this site
Grey Reef Shark is listed as a curated species here based on historical reports.