Family rivalry at its best, Al McGlashan vs his fishing mad son Cooper in a battle for the Kingfish title right in front of the iconic Sydney Harbour. It's more than family pride at stake – they are on a mission to tag a big one. It is a race against time to help researchers unlock the secrets of the ocean and there is a whole lot of ribbing along the way!

Al McGlashan heads to country Victoria to take on his brother Stew. They kick off on the picturesque Lake Eildon before changing things up and heading to the saltwater in search of the best eating fish in the sea. It's not all brotherly love and the loser has to do the farm chores, including bathing Barney the bull!