Magic seaweed alternatives.

Gear selectivity to species is overall a grey area, as salmon will sometimes bite everything. A lot of guys like to mooch herring for bottomfish, which can be a great way to catch salmon as well. Many salmon bite shrimp flies intended for bottomfish every year. Similarly, I sometimes can't keep the schooling midwater rockfish off a trolled Brad's Cut Plug. Theoretically, I could tie a barbed treble on that Brad's and claim to OSP that the salmon in my boat were caught on barbless single hooks before they saw me, and that I switched to the barbed treble to target the rockfish.

It'd turn into a headache for OSP discretion. A lot of anglers out there are seeking to exploit any 'loophole' they think they can find in the regulations. To avoid the headaches, it's just easier to make it a hard n fast rule that's easy for everyone to interpret. I don't want to burn money on a ticket that I can easily avoid, but that's just me.