Bigeye Trevally
Caranx sexfasciatus
Sighting evidence at Shark Island, Kosrae
Photo: Mark Rosenstein · CC BY-NC
Bigeye trevally form dense tornados of hundreds of individuals above Shark Island's summit, a defensive balling behaviour triggered by the presence of the grey reef sharks circling below. The interaction between the trevally school and the resident shark population creates a dynamic, constantly shifting underwater theatre that plays out on virtually every dive. At the end of the dive, ascending through the swirling silver column of trevally with the sunlit surface above is one of Kosrae's defining underwater memories.
Evidence at this site
No confirmed records on file at this site
Bigeye Trevally is listed as a curated species here based on historical reports.