Notropis buchanani Meek. UMMZ 3. Inclusion of the ghost shiner is based on two specimens (UMMZ 63107) collected by C. W. Creaser in 1924.
Phenacobius mirabilis (Girard). KU 6, 7, 8, 10, 11, 12, 13, 15; UMMZ 4; DM 3, 6, 16, 18, 21, 22, 34. The suckermouth minnow occurred in several collections but was nowhere dominant. The largest populations were at DM 3, 6, and 22.
Hybognathus nuchalis Agassiz. KU 8, 15; UMMZ 3; DM 1, 6. The silvery minnow was taken only in the downstream portion of the Wakarusa and its lower tributaries.
Pimephales promelas Rafinesque. KU 6, 7, 8, 9, 10, 11, 13, 14, 15; UMMZ 1, 4, 5; DM all stations except 1, 8, 10, 11, 13, 14, 30. The fathead minnow was ubiquitous, and was dominant at several stations on the smallest creeks.
Pimephales notatus (Rafinesque). KU 1, 6, 11, 12, 14, 15; UMMZ 1, 4, 5; DM 6, 8, 10, 12, 16, 17, 18, 24, 25, 26, 37, 41. The bluntnose minnow occurred at several stations on tributaries but was not common.
Campostoma anomalum (Rafinesque). KU 7, 8, 10, 11, 12, 13, 14; UMMZ 4, 5; DM 3, 9, 10, 11, 13, 15, 16, 17, 18, 19, 20, 21, 22, 24, 25, 30, 32, 33, 34. The stoneroller was usually abundant at upstream stations and was found in the mainstream of the Wakarusa River.
Ictalurus punctatus (Rafinesque). KU 6, 8, 10, 11, 12, 13, 15; DM 1, 2, 18, 24. Channel catfish were taken by us only in the mainstream; anglers sometimes catch channel catfish in several of the tributaries.
Ictalurus melas (Rafinesque). Black bullhead. KU 1, 2, 5, 6, 9, 14; UMMZ 2, 5; DM 5, 6, 7, 16, 17, 21, 25, 26, 31, 32, 33, 38, 39, 40.
Ictalurus natalis (LeSueur). Yellow bullhead. KU 9, 14.
Pylodictis olivaris (Rafinesque). KU 8, 10; DM 18. The flathead catfish comprises a small but consistent part of the sport fishery of the Wakarusa, especially in the mainstream.