Flathead Catfish
Pylodictis olivaris · Ictaluridae
About this fish
- Spawning
- June and July
- Largest length
- up to 155 cm (61 inches)
- Lifespan
- up to 23 years
- Matures at
- about 4.5 years old
Values come from a national database of the United States, not Wisconsin surveys: maximum length is the species' largest recorded anywhere, and spawning months are range-wide (Wisconsin timing, in a colder climate, can be later).
USGS FishTraits 14.3 (CC0). Credit: Frimpong and Angermeier, U.S. Geological Survey.
27 open records of this fish in Wisconsin were used here.
Lakes where it has been recorded
From open fish survey and museum records. A record shows the fish was found near the lake in that year, not that it is there now.
Showing 5 of 5 lakes
- Lake OnalaskaLacrosse County7,688 acres · 40 ft deeprecorded 1928 to 2023 (2 records)Lowrecorded
- Lake Saint CroixPierce County4,668 acres · 60 ft deeprecorded 1997 to 2006 (5 records)recorded
- Tomah LakeMonroe County225 acres · 19 ft deeprecorded 2004 (1 record)stocked, recorded
- Neshonoc LakeLacrosse County737 acres · 11 ft deeprecorded 2002 (1 record)Lowstocked, recorded
- Lac La BelleWaukesha County1,164 acres · 45 ft deeprecorded 1991 to 1997 (8 records)Moderatestocked, recorded