A NUMBER of fish-attracting devices (FADs) are being installed off the NSW north coast with the aim of enhancing recreational fishing opportunities.

Department of Primary Industries' Fisheries Enhancement manager Dr Heath Folpp said the devices would be placed at key fishing spots.

"Twenty-five fish-attracting devices are in the process of being deployed to entice popular fish species such as mahi-mahi and marlin to the NSW coastline for the enjoyment of recreational fishers," Dr Folpp said.

"Monitoring has shown these devices are extremely effective at creating new high-value fishing opportunities."

FADs are yellow buoys with a flashing beacon for safe navigation.

They attract surface-dwelling fish such as mahi-mahi and other fast-growing oceanic fish.

The devices are designed to withstand harsh coastal conditions and are deployed between 9km and 32km offshore.

Full details of where each FAD is located can be found online at fisheries.nsw.gov.au.