Iowa DNR
Iowa DNR Fish Kill Database

Fish Kill Event - East Okoboji Lake and Lower Lake Chain

Fish kill was evident on most of the Okoboji Chain

Event ID
995
Date of Kill
6/3/2020
Waterbody Type
Lake
Cause Origin
Natural
Cause
Disease/Parasite/Stress
Mode
N/A
Magnitude
3 (1001 - 5000 fish killed)
County
Dickinson
ESD Field Office
FO 3
Fisheries Office
Spirit Lake Hatchery
LongDD
-95.11318
LatDD
43.38272
Created Date
6/19/2020 12:15:01 PM
Last Update
6/19/2020 12:38:11 PM
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

Thousands of yellow bass were observed floating in the lake and along the shoreline of East Okoboji, West Okoboji, and the Lower Chain of Lakes. Yellow bass were observed spawning and the kill is attributed to a rapid increase in water temperature, spawning stress, and year class density. No counts were made and the number reported is an estimate based on observations from boat and shore. More yellow bass likely died than observed.