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It's a phycid hake (Family Phycidae), a group closely related to the true cods (Gadidae). I'm not familiar with this group as we don't get them out in the Pacific. Based on the location where this was caught and descriptions from Fishbase, I suspect this is the spotted codling (Urophycis regia).
This is not a coho but rather a steelhead (sea-run rainbow trout).
It's definitely a smelt of some kind. Can't tell species from photo.
This is definitely a starry flounder, not a halibut!
I think this is a juvenile starry flounder, not a halibut.
I would say this is a rock sole (Lepidopsetta bilineata) rather than a sand sole. The sand sole has a much larger mouth and has a nearly straight lateral line, compared to the arch seen here.
See here: http://wdfw.wa.gov/fishing/bottomfish/id...
It's a greenling, most likely a female kelp greenling (Hexagrammos decagrammos) though the color seems off.