Well, "trout" is one descriptor, certainly. Perhaps not the most accurate, but it will do. Saves us the effort of saying "homeostatic fish hybrid with ultraviolet vision and the intelligence of a Tulane graduate student." That's one particular graduate student, a doctoral candidate who volunteered for the experiment for a laugh. I'm assuming he got it.
As to "the one that got away" why yes, it did. And as it escaped, it looked to be in a mood to settle scores with all our race. This should upset me, as the--ahem--trout's rebelliousness is a reminder that I lost control of the game, if only for a few minutes. But the presence of this piscine schemer complicates and fruetrates all plans, not just my own. So hesh up, boy.