The salmon farming industry fears that the current health scare over the safety of farmed Scottish salmon could put wild fish at risk, says a report in The Western Mail.
The paper on pollutants in salmon published in Science this week, says some farmed salmon may contain more than 14 times the toxin levels found in wild fish.
The report, called "sensationalist" by some salmon experts, said that it may be unsafe to eat more than one portion of farmed Scottish salmon every month, or in some cases, every four months.
Experts told The Western Mail that the fear low-pollution wild salmon from Welsh rivers may be at increased risk from poaching or fishing.
"Do not accept salmon from any dubious source - especially if it is wild salmon," Patrick O'Reilly, chairman of Environment Agency Wales' fisheries advisory committee told the paper.