Sea Gull

Temperature and dissolved oxygen (DO) measurements were collected from the deepest basin in Sea Gull Lake on August 8th, 2024, to evaluate the quantity and quality of cold, oxygenated water (i.e., oxythermal habitat) available to Lake Trout, the most sensitive coldwater species present in this lake (Lake Whitefish and Cisco, also known as 'Tullibee', are also present). During the summer, Lake Trout require a layer of oxythermal habitat that contains water temperatures below 8.8 degrees C (47.8 degrees F) and dissolved oxygen concentrations above 3.0 mg/L. Based on the profile from the deepest basin (maximum sampled depth 88.6 feet), the water temperature decreased below 8.8 degrees C (47.8 degrees F) at 45.9 feet and the dissolved oxygen concentration stayed greater than 3.0 mg/L at 88.6 feet at the time of sampling. The thickness of this layer of water in the water column was 42.6 feet, indicating that oxythermal habitat was present for Lake Trout. Further, the temperature at which dissolved oxygen decreased to 3.0 mg/L (i.e., TDO3, a single variable to characterize oxythermal habitat) was never reached because dissolved oxygen remained above 3.0 mg/L throughout the sampled depths. In this case, the minimum temperature, 7.2 degrees C (45.0 degrees F), was substituted as TDO3. TDO3 values cooler than 8.8 degrees C (47.8 degrees F) indicate that oxythermal conditions were suitable for Lake Trout at the time of the survey. Data collected by the Minnesota Department of Natural Resources during the late summer period of maximum oxythermal stress (July 26th to Aug 24th) in 1977 and 2018 also indicate suitable oxythermal habitat in all years surveyed, with the least favorable conditions recorded in 1977. When inadequate oxythermal habitat is available, Lake Trout are squeezed into unfavorable, warmer water conditions and experience higher levels of stress.

Temperature and dissolved oxygen (DO) measurements were collected from the deepest basin in Sea Gull Lake on August 8th, 2024, to evaluate the quantity and quality of cold, oxygenated water (i.e., oxythermal habitat) available to Lake Trout, the most sensitive coldwater species present in this lake (Lake Whitefish and Cisco, also known as 'Tullibee', are also present). During the summer, Lake Trout require a layer of oxythermal habitat that contains water temperatures below 8.8 degrees C (47.8 degrees F) and dissolved oxygen concentrations above 3.0 mg/L. Based on the profile from the deepest basin (maximum sampled depth 88.6 feet), the water temperature decreased below 8.8 degrees C (47.8 degrees F) at 45.9 feet and the dissolved oxygen concentration stayed greater than 3.0 mg/L at 88.6 feet at the time of sampling. The thickness of this layer of water in the water column was 42.6 feet, indicating that oxythermal habitat was present for Lake Trout. Further, the temperature at which dissolved oxygen decreased to 3.0 mg/L (i.e., TDO3, a single variable to characterize oxythermal habitat) was never reached because dissolved oxygen remained above 3.0 mg/L throughout the sampled depths. In this case, the minimum temperature, 7.2 degrees C (45.0 degrees F), was substituted as TDO3. TDO3 values cooler than 8.8 degrees C (47.8 degrees F) indicate that oxythermal conditions were suitable for Lake Trout at the time of the survey. Data collected by the Minnesota Department of Natural Resources during the late summer period of maximum oxythermal stress (July 26th to Aug 24th) in 1977 and 2018 also indicate suitable oxythermal habitat in all years surveyed, with the least favorable conditions recorded in 1977. When inadequate oxythermal habitat is available, Lake Trout are squeezed into unfavorable, warmer water conditions and experience higher levels of stress.

Temperature and dissolved oxygen (DO) measurements were collected from the deepest basin in Sea Gull Lake on August 8th, 2024, to evaluate the quantity and quality of cold, oxygenated water (i.e., oxythermal habitat) available to Lake Trout, the most sensitive coldwater species present in this lake (Lake Whitefish and Cisco, also known as 'Tullibee', are also present). During the summer, Lake Trout require a layer of oxythermal habitat that contains water temperatures below 8.8 degrees C (47.8 degrees F) and dissolved oxygen concentrations above 3.0 mg/L. Based on the profile from the deepest basin (maximum sampled depth 88.6 feet), the water temperature decreased below 8.8 degrees C (47.8 degrees F) at 45.9 feet and the dissolved oxygen concentration stayed greater than 3.0 mg/L at 88.6 feet at the time of sampling. The thickness of this layer of water in the water column was 42.6 feet, indicating that oxythermal habitat was present for Lake Trout. Further, the temperature at which dissolved oxygen decreased to 3.0 mg/L (i.e., TDO3, a single variable to characterize oxythermal habitat) was never reached because dissolved oxygen remained above 3.0 mg/L throughout the sampled depths. In this case, the minimum temperature, 7.2 degrees C (45.0 degrees F), was substituted as TDO3. TDO3 values cooler than 8.8 degrees C (47.8 degrees F) indicate that oxythermal conditions were suitable for Lake Trout at the time of the survey. Data collected by the Minnesota Department of Natural Resources during the late summer period of maximum oxythermal stress (July 26th to Aug 24th) in 1977 and 2018 also indicate suitable oxythermal habitat in all years surveyed, with the least favorable conditions recorded in 1977. When inadequate oxythermal habitat is available, Lake Trout are squeezed into unfavorable, warmer water conditions and experience higher levels of stress.

Based on Minnesota DNR survey data, anglers target Walleye, Lake Trout, Northern Pike, Black Crappie, and Yellow Perch in Sea Gull. See the full species list above for catch rates, size structure, and quality scores.

Minnesota DNR records list public access for Sea Gull. Check the DNR LakeFinder page for the launch type and directions before you go.

Sea Gull has a maximum depth of 145 feet and a mean depth of 36 feet, per Minnesota DNR data.

The most recent Minnesota DNR survey data for the main sport fish in Sea Gull is from 2024.

Yes — Sea Gull has confirmed spiny waterflea. Clean, drain, and dry your equipment to avoid spreading invasives to other waters.

Yes — the 2026 Minnesota DNR regulations list 1 special rule for Sea Gull, covering walleye. Special regulations override the statewide limits; see the fishing regulations section on this page. Verify current rules with the Minnesota DNR before keeping fish.