The FishHeads are going prehistoric with the Bowfin - a predator fish that has been around since the time of the dinosaurs! It's still hanging out in Lake Ontario, where Sayat joins the Department of Fisheries and Oceans to try and catch one for research. Once they've got him, Christian attaches acoustic tags so the fish can be released, and the research can begin. All in a day's work for Leo's FishHeads!