I once saw this one guy suggest that the thing to do with an unwanted hatchery fish is to hang it in the trees... Puts the non-native carcass and its bad juices out of the river all together, he said. But when this guy suggested that, a bunch of people got upset because hanging unwanted hatchery fish in trees (or throwing them into bushes) seemed wasteful.

The guy said that the wasteful part was spending limited funds to create fish that were planted into rivers with no collection facilities, saw few anglers because they never "stacked up" and threatened the native populations when they tried to spawn.

The guy did concede that some rivers are doomed hatchery hatcheries, and on those rivers unwanted hatchery fish can be sent off to the trap for food bank collection, he said.

Don't remember who the guy was.