Be careful with those marlin. I caught this 500 pounder in the leg back in 2015. All my years of fishing I've been very careful with marlin but a moment of oversight combined with fatigue almost cost me my life if it hit my artery or if i fell i might have taken it in the chest, face or neck. always be aware where the bill is at all times and control it. Never get in front of that bill.
I understand and respect your view on releasing marlin, not here to argue that. Obviously he was just sharing what could happen even to an experienced fisherman. It can be dangerous both keeping and releasing.