* No native fish species fit that description: The dominant fish species in Utah Lake are carp, catfish, bass, and perch. None of these species have that specific color combination.
* Introduced species: There are some non-native fish in Utah Lake, but their color patterns don't typically include bright orange.
* Possible confusion: You might be thinking of a fish from a different location, or your memory of the color pattern might be a bit off.
If you're trying to identify a specific fish:
* Do you have a picture? A picture would be the most helpful for identification.
* What size was the fish?
* Where exactly in Utah Lake did you see it?
Let me know more details, and I'll do my best to help you identify the fish!