Maybe we are looking at this all wrong...
If they can be caught, then a simple knife thru the gills and throw them back.
On a more commercial prospective, They can be turned into fertilizer, pet food, ect... There has to be a market for them.
Finally they are edible.. supposed to taste like cod.
Take a look-see at this video..
https://youtu.be/T1NVUV8yhmU
https://youtu.be/CB-fmA07gZ8