Unusual Association of Skipjack Tunas Katsuwonus pelamis and a Longline Vessel

Skipjack tuna were observed for the first time swimming in front of the bow of a fishing vessel during a tagging campaign in the North Atlantic. Video recordings show how tuna adapted their speed and direction to the vessel, using the pectoral fins to move from top to bottom and back and forth across the bow of the ship. We discuss the potential drivers of this behaviour.