I get asked a lot about the extremes — the biggest and smallest fish, hardest to catch, and so on. To tell the truth, they were all hard in their own way, but some of them took more persistence than others. Some species are inherently difficult to catch. Many inhabit waters far from home. That means lots of travel — which anyone who has spent time in airports knows can be quite a downer — and of course there’s no guarantee the fish will be there, so some species have taken multiple trips.