Thanks for the reply. The fish was very light green colored, not the darker blue back of a steelhead. Other than the white stuff on it’s gills it seemed healthy.
Had a great day at the oak catching a bunch of steelhead and a few kings out in no man’s land but came across this ….. I have only seen sea lice in pictures but it can’t be? It was on a very large steelhead/ but looked more like a rainbow imo.