But Jim Portus from the South West Fish Producers Organisation said a trial in Brixham and Plymouth using new nets had reduced the discard by more than 50%.
It has nonpredatory neighbors to its north and south and fish to its east and west.
This was demonstrated by a recent project run by the University of South Florida, in which a glider successfully mapped the locations of red grouper and toadfish populations on the West Florida Shelf from the noises the fish made.
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Once found mainly in the north east Atlantic, in recent years the fish have tended to head north west towards Iceland and the Faroe Isles following their prey of squid and crustaceans.
The fish, drifting in the gyre, would grow as the current took them west toward the Yucatan, then north into the Gulf of Mexico and finally into the Gulf Stream where the fish could pass near Miami just as they are good-eatin' size.
Labour AM for Mid and West Wales Alun Davies raised concerns for the food, fish and drink industry and challenged the minister on her decision not to protect that budget.
Earlier this year, the firm won permission for a similarly large-scale fish farm on Loch Torridon in the north-west Highlands.
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Volunteers from The West End Anglers and The Northumbrian Anglers Federation helped restore the fish pass, which had been closed for 20 years after it had fallen into disrepair.
In the past decade, 1m non-native Atlantic salmon have escaped from fish farms and established themselves in streams in the north west of America.
In the new recreation-minded West, cheap power is now seen as less important than swift-flowing rivers teeming with fish.
"One of the key findings of this paper is that we can now explain the genetic mosaic of salmon in Britain and Ireland as being made up from fish that migrated in from the Iberian peninsula and a previously unrecognised refuge for salmon in North-West France, " Dr Stevens observed.
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