The Department of Environment, Food and Agriculture is asking anglers to be responsible with their tackle.
This week, it took to Facebook to issue a plea for people not to discard fishing line near Cringle Reservoir.
Fisheries officers say they picked up a large amount of old line after a complaint from an angler.
DEFA says anglers should make sure they dispose of old line responsibly as it can kill wildlife long after it's left behind.
High ground could see 4 inches of snow on Saturday night
Mountain Road unlikely to open before Monday
Yellow warning for freezing temperatures tonight
School bangers night called off
AK47 and Uzi handed in to police
"No dispute" over Liverpool Ferry Terminal, says main contractor
More weekend bus strikes to come after 10-day walkout?
Minister to face question about bus strike