After my PhD defence on blacktip reef shark’s behavioural ecology, I was part of an expedition and started a new CRIOBE project in collaboration with Michael Domeier and other scientists in a special place in French Polynesia were Camouflage Groupers (Epinephelus polyphekadion) aggregate a month a year for spawning. The place is also characterized by the presence of undreds of grey reef sharks as well as tenth of blacktip sharks (Carcharhinus limbatus). We started to study this almost pristine ecosystem from sharks to fish.
During the spawning aggregation of groupers, plenty of grey reef sharks enter in feeding frenzy and predate on groupers.
Check out this video I made, begining with the shark wall, then with the begining of grouper aggregation and finishing with spawning and predations (predation at 08:18).