Vrana Lake can also boast a rich fish stock. Due to the increased salinity of the water since the lake is located near the sea, it is inhabited by freshwater and marine species which makes this lake very interesting for fishing. Fishing is possible in the entire area of Lake Vrana, except in the area of the ornithological reserve. Eel fishing is prohibited due to its small population. Fishing other species is permitted. Although camp Vransko Lake falls under the area of the protected reserve, fishing is still allowed but only 300 meters from the shore by boat or kayak. The allowed daily amount of fish 5 kilograms, with the allowed catch of one fish of over 5 kilograms, but then there is a surcharge for the weight over 5 kilograms.
http://www.pp-vransko-jezero.hr/en/information-for-fishermen/