So I was perusing Tumblr, as you do, and I found some other photos of this charming fellow on Seanan McGuire’s blog there (this one’s public domain, so I felt okay about posting it, plus it gives you a better overview of the fish).
This is the sarcastic fringehead, ladies and gentlemen (and if that isn’t a name to warm your heart, I don’t know what is). But what I thought, immediately upon seeing it, was Holy cats, that’s the thing that chews on Corwyn’s leg in “The Drowned Man!”
Well, with less color, and you have to take away the fringe. Add a few inches of length and a lot more teeth. But that’s pretty much it. And here I thought I’d made it up in my head.
(If you haven’t read that story yet, don’t worry, that’s a very minor spoiler. And you should go read it.)