You need to be able to identify all of the species that you might encounter, and also have instant recall of the regulations that apply as to whether you can retain or not.
From the surf, you will predominantly encounter surf perch. You might encounter the very, very, very occasional sole. There are a few select places where you might find starry flounder, and some very well known shore spots inside the bays where you can fish for salmon (think SS beach inside the jetty at the mouth of the Columbia).
From the jetties, yah maybe a salmon, more likely rockfish, a possible underling (undersized ling cod that you must release), pile perch, and then greenling and other pogie fish.
On the rockfish, you have many subspecies to learn how to recognize, and the rules on whether and how many you can retain. It changes year to year, so be mindful and dilligent.
In southern Oregon you may encounter striped bass.
Any other encounters would be extraordinary.
When in doubt, throw it back.