In my experience, if your targeting halibut and your catching lings or yelloweye, your in the wrong area, they do not inhabit the same area as a general rule. Lings and snaps like structure, pinnacles, reefs, ledges and drop-offs, halibut prefer flats.
I've got a list of over 400 waypoints around Prince of Wales Is., about 1/2 are salmon spots the others are either marked as halibut or lings/snaps none are labeled as butts/lings and snaps. One thing to keep in mind, if a rockfish or small ling spends much time in halibut territory, they will end up as halibut lunch.
I have successfully released yelloweye, the key being, once you realize its a rockfish, bring it up SLOW and stop about every 25 ft, give them a chance to adjust to the pressure change, if there air bladder isn't blown up, they will swim away, if it is, poke a small hole in it, alot of times these fish will also swim away. If you do reel them up at warp speed, forget it, throw'em in the box.