Trout, arctic charr.
Area is actually larger than shown on map as it includes most of Lake Övre Boksjön, southern section of Lake Nedre Boksjön and east part of Kråkbergsbleriken. It also covers lakes Fetträsket and Sågtjärn.
Here you can buy fishing permit:
Hemavan Tärnaby Turistbyrå +46 (0)954 104 50