The BBC reports that Scottish salmon farmers have raised concerns about Green MSP influence on their industry if a co-operation deal is struck with the Scottish National Party government.
The prospect of any deal is alarming others in the food industry, who see the Scottish Greens as hostile to business growth and livestock farming.
On aquaculture, the party’s manifesto set out plans to toughen conditions on licences to farm in coastal waters.
It went on to say that caged farming should be phased out.
Until then, the Greens want to block growth of the sector until environmental and animal welfare concerns are addressed.
The Scottish Salmon Producers Organisation says talk of a possible SNP-Green coalition government, or co-operation deal, is concerning its members.
A spokesman said the manifesto plans have the potential to prejudice the sector’s future and thousands of jobs.
The National Farmers Union Scotland issued a statement after news broke of the SNP-Green co-operation talks which hinted strongly at tensions between farmers’ priorities and those of Green politics.