We have received instructions from NRW about what to do if you catch a farmed salmon. It seems that if you catch a suspected farmed salmon in Wales it has to be photographed/recorded and returned to the river alive unlike England and Scotland where any escapee farmed salmon must be killed. It seems that NRW does not trust Welsh anglers not to kill wild salmon using the excuse that they thought they were escapee farmed fish. If you click this link you can read the NRW briefing note: Briefing Note Escaped farmed salmon