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see catfishcatfish,
common name applied to members of the fish families constituting the order Siluriformes, found in fresh and coastal waters. Catfish are named for the barbels ("whiskers") around their mouths and have scaleless skins, fleshy, rayless posterior fins, and sharp defensive
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Five species each composed over 5% of the catch: sturgeon chub (38%), channel catfish Ictalurus punctatus (22%), stonecat (12%), flathead chub (11%), and sicklefin chub (6%).
Channel catfish (Ictalurus punctatus) were present at the end of June and the beginning of July, while stonecat madtoms (Noturus flavus) did not appear in the drift until the beginning of August.
The freckled madtom may be confused with three other sympatric madtom species within the Chicago Region: the stonecat (Noturus flavus), slender madtom (Noturus exilis), and tadpole madtom (Noturus gyrinus).