The capture of three specimens of Seriola rivoliana is reported from Mallorca (Balearic Islands). It represents the first report of the species in the western Mediterranean and the fourth and fifth for the whole Mediterranean. Morphometric and meristic measurements are provided, and the presence of this species and other Atlantic migrants of the genus Seriola in the Mediterranean are discussed.

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.

In the present paper a specimen of the blue runner Caranx crysos, a thermophilic species commonly found in subtropical Atlantic waters, was newly reported from the Mar del Plata coast. The presence of the blue runner in Argentine waters could be explained by the warm drift theory.

The diet of blue runner Caranx crysos (Carangidae) in the Gulf of Gabès (Tunisia, Mediterranean) is described from analysis of stomach contents (N = 1668 fish). The majority of samples were obtained from commercial purse seine and gill-net catches. The index of vacuity (%VI) was relatively high (58.7%) and differed significantly across months. Blue runner is an opportunistic predator that consumes mostly pelagic organisms, with benthic prey representing only a small proportion of the diet. The diet was quantified using the frequency of occurrence (%F), numerical abundance (%N), weight (%W) and the index of relative importance (IRI and %IRI) for each prey taxa.

The most important prey categories were teleosts (%IRI = 83.4) and crustaceans (%IRI = 16.6), with molluscs only observed occasionally (%IRI < 0.1). Fish were also the dominant food items in both terms of weight (89.60%) and frequency of occurrence (82.44%). In terms of numerical abundance, crustaceans were the most abundant prey (78.07%). Ontogenetic and seasonal differences in the diet were observed, although there was no difference between the diets of males and females.