In the U.S. West Coast groundfish bottom trawl fishery, Pacific halibut (<i>Hippoglossus stenolepis</i>) bycatch can impact some fishers’ ability to fully utilize their quota shares of groundfishes. In this study, we compared the catch efficiency for Pacific halibut and four commercially important groundfish species between an illuminated and non-illuminated trawl. The illuminated trawl caught ...