Fishing in Arnarvatnsheiði has certainly gained popularity in recent years. The lakes on the heath are numerous and varied and despite all modern technology and with improved transportation, there are still unexplored areas in many parts of the heath. The lakes at Arnarvatnsheiði have both brown trout and Arctic char and the same species can also be found in rivers and streams. In general, the char in the lakes are around 1 – 3 pounds, with the trout around 2 – 5 pounds. The heath provides abundant food for fish, mainly black flies and midges. The flies seem to bite people rather selectively, with some anglers barely aware of the flies while others are bitten and the bites swell.