Spiny waterflea confirmed in Lake Vermilion

MN DNR, Northland Outdoors
When populations of spiny waterfleas are high, anglers can experience frustration with masses of the waterfleas clogging fishing and downrigging lines, and other water equipment. MN DNR

Spiny waterflea has been confirmed in Lake Vermilion in northern Minnesota.

Anglers reported suspected spiny waterfleas to Department of Natural Resources staff and supplied a specimen to the DNR fisheries office in Tower, where it was positively identified. DNR aquatic biologists surveyed portions of the lake with plankton nets and weighted lines to confirm the presence of spiny waterflea in the lake. Live specimens were located near J B and Ely islands in the east basin.

Lake Vermilion and the Vermilion River will be designated as infested waters, and signs will be posted at public water access points to alert boaters and other recreationists. Crane Lake, a downstream water, is already designated for spiny waterflea.

“DNR staff are coordinating with the Bois Forte Band of Chippewa and U.S. Forest Service to alert boaters and other recreationists of the risk of spread,” said Rich Rezanka, DNR aquatic biologist.

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