Iowa DNR
Iowa DNR Fish Kill Database

Fish Kill Event - West Okoboji Lake

Dead fish were observed on the north shore

Event ID
994
Date of Kill
6/5/2020
Waterbody Type
Lake
Cause Origin
Unknown
Cause
Unknown - Natural Suspected
Mode
N/A
Magnitude
2 (101 - 1000 fish killed)
County
Dickinson
ESD Field Office
FO 3
Fisheries Office
Spirit Lake Hatchery
LongDD
-95.17152
LatDD
43.42779
Created Date
6/19/2020 12:07:07 PM
Last Update
6/20/2020 8:45:53 AM
For more information about this fish kill event, contact the Field Office or Fisheries Office listed above.
Impacted Assessment Segments
Lat/Long uses WGS84 datum
Onsite Comments

Dead fish were reported on the north end of West Okoboji Lake. Hundreds of fish (mostly yellow bass or yellow bass/white bass hybrids) were found along the north shoreline. Some of the fish exhibited lesions indicating bacterial/viral infection. Most of the fish were large and likely the same year class indicating a spawning/age mortality event. Very few bluegill, bullheads, largemouth bass were also found. Likely coinciding with spawning stress and age.