The Bonneville whitefish (Prosopium spilonotus) is a salmonid fish endemic to Bear Lake on the Utah-Idaho border.

In appearance, it is very similar to the closely related Bear Lake whitefish P. abyssicola.

Generally whitish in color, its nose is more tapered than that of the Bear Lake whitefish, and its scales are smaller.

It generally inhabits mid-levels of the lake, where it primarily feeds on chironomid larvae and pupae, along with a variety of insects.

The female will stop to spawn, with 5-6 males in attendance, the total process lasting 5 to 15 seconds before the fish rejoin their school.