Robert Lennox is a PhD candidate at Carleton University and recently co-authored the report, “What Makes a Fish Catchable by Hook and Line”. Roberts this week’s guest on Blue Fish Radio because, who doesn’t want to know why fish aren’t biting. Lawrence and Robert discuss the origins of hooks and lines, and their various applications to recreational, commercial and subsistence fishing. The predator -prey dynamic is discussed, how fish move between vulnerability and invulnerability, and how certain fish learn to avoid capture. Of importance to us all, is the research Robert hopes to do next to create a stronger understanding about how hook and line fishing can increase catch efficiency and selectivity to improve the sustainability of our commercial fisheries.