A survey of the fishes of the mainstream of the Illinois River in northwestern Arkansas produced 51 species representing 11 families. Four of these species, Ictiobus bubalus, smallmouth buffalo; Moxostoma carinatum, river redhorse; Lepomis gulosus, warmouth; and Percina phoxocephala, slenderhead darter, have not been recorded previously from the Arkansas part of the Illinois. Eleven additional species have been reported previously that were not collected during this survey, for a total of 62 species known in the Illinois River.
Geihsler, Michael R.; Short, Edgar D.; and Kittle, Paul D.
"Preliminary Checklist of the Fishes of the Illinois River, Arkansas,"
Journal of the Arkansas Academy of Science: Vol. 29
, Article 13.
Available at: http://scholarworks.uark.edu/jaas/vol29/iss1/13