I've noticed dorsal fin ray deformation in hatchery steelhead but haven't paid close enough attention. I don't know if it's ubiquitous among hatchery strains. It's easy to see if you're looking, the dorsal will not stand up nice & straight. Trouble is I haven't always looked...wdfw trained me to look at the adipose instead. Hoping to get ideas on whether it's genetic or a result of the hatchery environment. I'm interested in any research that has delved into this. Hoping maybe some WFF resident biologists can push me in the right direction.