- Side view adult.
- Side view adult.
- Side view adult; the opercle and the caudal peduncle region were damaged during capture by the gill net.
- Top view adult; the opercle and the caudal peduncle region were damaged during capture by the gill net.
- Bottom view adult.
- Head-on view adult.
- Close-up flank.
- Close-up head; the opercle region was damaged during capture by the gill net.
- Close-up mouth and snout.
- Close-up tail.
- Close-up dorsal fin.
- Close-up anal fin.
- Close-up pectoral fin.
- Close-up pelvic fin.
- Notice the solid color, the deeply forked tail, the "free" adipose fin, the steep profile, and relatively small eye.
- Close-up anal fin: There are 30-36 rays, including rudimentaries, the margin is straight.
- Close-up head: The upper jaw is longer than the lower; the profile is steep and the eye is lateral and relatively small.
- Close-up inside of mouth: Notice the absence of horn-like backward lateral extensions from the tooth patch on the roof of the mouth.
- Notice the lack of spots even in small fish; the anal fin base is longer than the post-orbital distance.
- Side view of a young-of-year: Juveniles are similar to adults, but with relatively larger eyes.
- Side view of a yearling: Juveniles are similar to adults, but with relatively larger eyes.
Bullhead Catfishes (Ictaluridae)
Mouth and Snout: Subterminal mouth and patches of numerous fine teeth on jaws. 8 obvious barbels (4 pairs: 2 pairs on chin, 1 pair on side of upper jaw near the corner of the mouth, and 1 pair on top of snout). Body Pattern: Solid color, bluish gray, olive, or cream; belly white. Fins and barbels moderately to darkly pigmented (chin barbels often white). No scales. Body shape and size: Body dorso-ventrally flattened with a tapered head; in cross-section approximately oval (with a long horizontal axis) to round with a flattened ventral surface. Typically 500-800 mm (20-32 in) TL; maximum reported in 1550 mm (62 in).
Forked tail. Single dorsal with 1 stout spine and 6 rays, attached by membrane. Pelvic fins abdominal. Adipose fin present. Anal fin with 30-36 rays (including rudimentary rays).
Obvious barbels. See also similar species information.
Similar to non-breeders.
Similar to adults, with a generally lighter color (photos).
None reported from Wisconsin.
|Catfish, Blue||30-36, edge straight|
|Catfish, Channel||24-27, edge rounded|
|Catfish, Flathead||14-16, edge rounded|
|Catfish, Blue||Solid at all ages|
|Catfish, Channel||Spotted as juveniles, small adults solid as large adults|
|Catfish, Flathead||Mottled with dark brown or black, mottling tending to disappear in adults|
|Catfish, Blue||Steep, straight or slightly concave profile; eye smaller and more lateral|
|Catfish, Channel||Relatively shallow, rounded profile; eye relatively large and dorsal|
|Catfish, Flathead||Broadly flattened, with short but wide horizontal mouth|
|Catfish, Channel||Very similar|
|Catfish, Flathead||Moderately similar|
|Catfish, Blue||Not native to WI, but has been stocked in the past - not established|