The opportunistic carnivore fish yellow jack (Carangoides bartholomaei) is recorded using swimming hawksbill (Eretmochelys imbricata) and green (Chelonia mydas) turtles as shelter to rove at Baía do Sueste, Fernando de Noronha Archipelago, north-eastern Brazil. This behaviour is probably employed by the fish to disguise and ambush its prey while roving over the reef flat.