Least Concern· population decreasing· assessed 2019

Bigeye Jack

Caranx sexfasciatus

Sighting evidence at Late Island Wall, Vava'u, Tonga

Photo: Mark Rosenstein · CC BY-NC

Bigeye jacks form baitballs of hundreds to thousands of individuals at the Late Island wall during morning current peaks, creating a living vortex just below the surface that attracts tuna, barracuda, and periodically silvertip sharks. The school behaviour is a coordinated predator-confusion strategy, and divers positioned at the wall's upper lip can experience the baitball rotating around them at close range.

Evidence at this site

0 records within 25 km

Confidence: low

No date on file

How is this calculated?

Sighting evidence is compiled from iNaturalist observation records within a set proximity radius, filtered for quality-grade observations. “Last confirmed” is the date of the most recent research-grade record. Record count covers a rolling 24-month window. Confidence reflects record count, recency, and consistency of seasonal signal.

Bigeye Jack

Evidence at this site

Also seen at other sites