North Atlantic Drift, a warm ocean current brings warm water, encourages growth of plankton and attracts a variety of fish species (herring, mackerel).
Large continental shelf (320 km), rich breeding ground for fish.
Shallow water, less than 100 metres, makes trawling for fish easier.
Coast has many sheltered bays and harbours, suitable for fish farming (aquaculture).
Fish farms e.g. Clew Bay Co. Mayo produces shellfish and salmon.
Killybegs, Co. Donegal main fishing port.
Expansion limited due to the Common Fisheries Policy (CFP), quotas on catches due to overfishing.
Restrictions on fishing seasons, vessel and net sizes. Main area of growth aquaculture.