Article on descending rockfish back to the depths

Short version is that a study supports the idea that using a descender helps.

Article:
https://www.fisheries.noaa.gov/feature-story/key-southern-california-rockfish-species-survive-capture-over-longer-term-following

And the full study results:
https://academic.oup.com/icesjms/advance-article/doi/10.1093/icesjms/fsab188/6378054

I also use a descender to release lake trout brought up from the depths. I have no idea on the survival rate for freshwater fish, but it has to be better than not using a descender…

https://myodfw.com/articles/make-your-own-descending-device

Skip the rubber band around the grip. Use a 24oz cannonball for weight in case you get a big yelloweye. Use a handline reel to hold your line. Use a line that is thick enough to easily handle by hand. Thinner paracord comes to mind.