Game fishing has long been popular along the Lagan. Most anglers use lures, but there are stretches that are suitable for fly fishing. The entire stretch from just downstream of the power plant in Laholm, and out to the estuary, is about 8 km in length. Fishing was made accessible for the general public through the creation in 1987 of the Lagans Fish Conservation Area.
Salmon fishing in the river Lagan has been important for the inhabitants of Laholm for a very long time. Kings, the church and ordinary people fought amongst themselves for the right to fish for the salmon. In the late 1800s about 20-30 tonnes of salmon were captured each year. At the big Karsefors rapids east of Laholm, up to 150 salmon could be caught per day. When the power station was built in the early 1900s, spawning grounds were lost and the salmon disappeared. By way of compensation, the power company started a salmon farm in Laholm – today this is one of the most modern in Europe. Nowadays around 90,000 salmon smolt are released into the river Lagan each spring.