Aggregations of wild Atlantic Bluefin Tuna ( Thunnus thynnus L.) at Mediterranean offshore fish farm sites: Environmental and management considerations

•The presence, frequency and occurrence of Atlantic Bluefin Tuna at Mediterranean fish farms have increased during last years.•This farm-attraction is generalized in the Mediterranean, which might have serious implications on the Mediterranean ABT populations.•These wild tuna aggregations might interact with farming and coastal fishing activities.•Knowledge on these issues is sparse and must be increased for better species conservation and management considerations.