Scottish salmon farming has a good track record of providing employment in remote communities, said McGrigor. If rationalisation followed the merger and involved closure of plants, such as those at Stornoway, Mallaig and Fort William, it would be "disastrous".
"We have put up with the problems of fish farming such as potential pollution and the effect on the wild fish population as so many jobs depended on it but a merger of this sort gives so much control to this company. It could could end up doing something in Scotland's back yard it is not allowed to do at home."
Scottish National Party MSP Fergus Ewing is to contact Pan Fish to discuss Mallaig and Fort William.