“Negotiations over mackerel fishing quotas have fallen apart, extending a dispute dubbed ‘the mackerel war’ that has been a thorny issue in Iceland’s EU membership bid. The European Union, Iceland, the Faroe Islands and Norway left a meeting in Edinburgh without reaching an agreement for 2014. Fishing is the main obstacle stopping Iceland from joining the EU. Reykjavik pulled out of accession talks indefinitely in September despite public support for a promised referendum on joining the bloc. Iceland and the Faroe Islands, a Danish territory with autonomy in fishing matters, have been engaged in a ‘mackerel war’ with the EU since they unilaterally increased their quotas in 2010.”
http://phys.org/news/2014-03-eu-iceland-nordic-mackerel-quota.html