Good question. But as much as I value releasing trophy fish to maintain excellent fisheries, if I have good reason to think I've got the world record fish, I'm keeping it. Being in the record book would be really cool. And yes, you're taking an amazing fish out of a fishery, but it's been passing on its genetics for a long time already. Taking one super-giant fish out of a fishery doesn't ruin it. And I would have no hard feelings towards anyone who thought they had a world record fish doing the same.