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.
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