Megan E Lewan (Former Employee)

Invasive round gobies (Neogobius melanostomus) take refuge in a bed of Cladophora and non-branching filamentous green algae, photographed by USGS divers (GLSC; Ann Arbor, Michigan; Chesterton, Indiana) during project sampling in western Lake Erie. Photo credit: Megan Lewan, USGS-GLSC.

USGS divers (GLSC; Ann Arbor, Michigan) take close-up photos and videos of sampling locations before collecting samples, such as this example taken three meters below the surface in Lake Ontario that is full of Cladophora growing on rocks. Photo credit: Megan Lewan, USGS.

Sugar Island on a beautiful blue backdrop as seen aboard the R/V Stonecat while sampling on Lake Huron near Alpena, Michigan. Photo credit: Megan Lewan, USGS.

A USGS diver (GLSC; Ann Arbor, Michigan) records information on her dive slate before collecting a benthic sample of submerged aquatic vegetation and invasive dreissenid mussels. Photo credit: Megan Lewan, USGS.

USGS divers “smile" for the underwater camera after a successful algae and mussel collection. Photo credit: Megan Lewan, USGS.

USGS scuba diver Madeleine Giordano collects mussels and algae samples from inside her quadrat while the USGS research vessel Stonecat looms above. Photo credit: Megan Lewan, USGS.

A USGS Great Lakes Science Center contractor uses an underwater quadrat to survey the nuisance algae Cladophora and invasive dreissenid mussel populations in Lake Erie as part of the Great Lakes Integrated Cladophora Assessment Project.

Smallmouth bass seen while SCUBA diving in Lake Erie as part of the Great Lakes Integrated Cladophora Assessment Project.

SCUBA tanks secured as a Great Lakes Science Center small vessel motors through the water to a dive site on Lake Erie where researchers will survey for the nuisance algae, Cladophora, as part of the Great Lakes Integrated Cladophora Assessment Project.

Filtering water with a vacuum pump to measure water quality and perform a nutrient analysis as part of the Great Lakes Integrated Cladophora Assessment Project - and - filtering COVID with a mask.