In my rooting around in things fishy, I'd discovered that a trout is a kind of salmon. Or not, as you say. And yes, I got muddled up in that toxonomic contretemps, quite unwillingly.
Since fish makes me puke, I'd never had any great interest in these things. But my work involves reading reams of gummint stuff, and gummint stuff up here all too often involves fish. Heck, the only real international brouhahas we've been embroiled in, in the last few decades (i.e. involving our own interests/sovereignty), were about fish -- the international boundary dispute relating to the French islands of St-Pierre-et-Miquelon in the Gulf of St. Lawrence, and our sabre-rattling at Spanish fishing trawlers within our coastal limit.
Consider, if you will:
http://canadagazette.gc.ca/partII/2003/20030604/html/sor176-e.htmlAh yes, the Anadromous Atlantic salmon. I picked a Canada Gazette search result for "fisheries act regulations" at random, but I actually happen to have had to read that particular set of regs, and their impact analysis statement, in depth and detail.
I wanted to give a link to one of the 100s of pages-long schedules to Fisheries Act regulations, listing fish after fish after fish, but they don't seem to put them on line. (They also publish them in their own separate inch-and-a-half thick special issue of the Canada Gazette, the place where statutes and regulations are first published, and it once took me far too long to figure this out, since the library I was, um, fishing around in had stacked that special issue separately from the others and I found it only by complete good fortune. And fortunately, next time I had to find it a couple of years later, I had retained that dim memory and was able to put my fingers on it readily.)
I'm mum about what I actually do, but imagine, for instance, that it involves reading Federal Court and Supreme Court judgments. Those judgments can be about just about anything. Sometimes they are about the parts of paper mills (when somebody tries to keep a spare one of every part on hand and call it a non-capital expense, e.g.), sometimes they are about the construction of bridges over the icy St. Lawrence (when a ship runs into one and crashes it up, e.g.) And sometimes they are about fish. My very first encounter with fish talk was back when Canada and France were duking it out in the International Court of Justice over the boundary line around St-Pierre-et-Miquelon. I learned far more than I wanted to know about straddling stocks of Atlantic groundfish. ("Straddling" as an adjective modifying "stocks", the herds of cod etc. that cross boundary lines, not an action that I learned how to do to groundfish stocks, I hasten to point out.) Only, few of these fish have names as straightforward as "cod".
I have bookmarks (somewhere on that old E drive now) to all sorts of academic sites all over the place that consist of fish names, and helpful bits of information about which fish have which kind of spots and stripes and the like.
You should talk to TX-RAT, who is also fond of fishing in bits of the Canadian outback where I've never been.