Upstream of Stull, brook trout are most common on Bowman Creek. From Stull to Noxen, brook trout and brown trout are equally common. Below Noxen, brown trout are predominant. Wild rainbow trout occur in the lower reaches, primarily due to natural reproduction and escapes from private hatcheries. The creek is one of the few streams in Pennsylvania that supports a wild rainbow trout population. Acid rain once adversely impacted the native brook trout population in the creek, but they have made a comeback.