A lough that made its own fish
Lough Melvin is a rare thing in fishing: a lough that evolved its own trout. Cut off since the last ice age, its brown trout split into distinct strains that breed true and rarely mix, each keyed to a different way of feeding. The gillaroo works the stony margins for snails, the sonaghan hunts open water, and the ferox turned predator on the lough's char and perch. Scientists study Melvin for exactly this reason, and anglers prize it because you can catch three different-looking, different-behaving trout in a single day.
The village of Garrison has fished this water for generations. The holiday centre that once housed visiting anglers has closed, but the tackle shops, the boats and the local knowledge remain, and the lough keeps drawing fly fishers who want to catch a fish that lives nowhere else.