On February 15, 2014, the European Commission announced the initiation of an anti-subsidy investigation on imports of rainbow trout (Oncorhynchus mykiss) live, fresh, chilled, frozen or smoked whether in the form of whole fish (with heads and gills on, gutted, weighing 1.2kg or less each), or with heads off, gilled or gutted (weighing 1kg or less each), or in the form of fillets (weighing 400g or less each) from Turkey. The products subject to investigation are classified under the following HS codes: 0301.9190, 0302.1180, 0303.1490, 0304.4290, 0304.8290 and 0305.4300. The complaint was lodged on January 3, 2014 by the Danish Aquaculture Association, on behalf of producers representing more than 25% of the total EU production of the products under scrutiny.
 
On October 29, 2014, the European Commission decided to impose a provisional countervailing duty on imports of rainbow trout originating in Turkey (Commission Implementing Regulation (EU) No 1195/2014). The rate of the duty ranges from 7.0% to 9.7% of the net free-at-Union-frontier price, depending on the company. The duty is applicable for a period of 4 months, starting on November 7, 2014. Commission Implementing Regulation (EU) No 1195/2014 was published in the Official Journal of the European Union (L 319) on November 6, 2014.
 
On February 26, 2015, the European Commission decided to impose a definitive countervailing duty on imports of rainbow trout originating in Turkey (Commission Implementing Regulation (EU) No 2015/309). The rate of the duty ranges from 6.7% to 9.5% of the net free-at-Union-frontier price, depending on the company. This duty entered into force on the day following the publication of the regulation in the Official Journal of the European Union (L 56), i.e. on February 28, 2015.

On 27 February 2020, the European Commission initiated a sunset review of the definitive countervailing duty imposed on import of the subject good from Turkey. This follows the application lodged on  25 November 2019 by the Danish Aquaculture Organisation.

On 26 May 2021, the European Commission extended the definitive duty imposed on imports of rainbow trout from Turkey. The rate of the duty ranges from 1.5% to 9.5% of the net free-at-Union-frontier price before duty depending on the company. The regulation extending the definitive duty was issued on 25 May 2021.