Summer Trout

Salmo aphelios is a species of trout, a salmonid fish endemic to Lake Ohrid in North Macedonia and Albania in the Balkans.

Salmo aphelios is one of four different forms of the Ohrid trout complex within the single lake, along with S. balcanicus, S. letnica, and S. lumi. The various trout forms, which have been suggested to be different species, are distinguished by their breeding time and habitat, by which they in practice are thought to be reproductively isolated from each other. Genetic data have not supported their distinction, though.