<P> Lake Michigan, like the other Great Lakes, supplies drinking water to millions of people in bordering areas . The lakes are collectively administered by the state and provincial governments adjacent to them pursuant to the Great Lakes Compact . </P> <P> Environmental problems can still plague the lake . Steel mills and refineries operate near the Indiana shoreline . The Chicago Tribune reported that BP is a major polluter, dumping thousands of pounds of raw sludge into the lake every day from its Whiting, Indiana, oil refinery . In March 2014 BP's Whiting refinery was responsible for spilling more than 1,600 US gallons (6,100 l) of oil into the lake . </P> <P> Lake Michigan is home to a wide variety of fish species and other organisms . It was originally home to lake whitefish, lake trout, yellow perch, panfish, largemouth bass, smallmouth bass and bowfin, as well as some species of catfish . As a result of improvements to the Welland Canal in 1919, an invasion of sea lampreys and overharvesting, there has been a decline in native lake trout populations, ultimately causing an increase in the population of another invasive species, the alewife . As a result, salmonids, including various strains of brown trout, steelhead (rainbow trout), coho and chinook salmon, were introduced as predators in order to decrease the alewife population . This program was so successful that the introduced population of trout and salmon exploded, resulting in the creation of a large sport fishery for these introduced species . Lake Michigan is now stocked annually with steelhead, brown trout, and coho and chinook salmon, which have also begun natural reproduction in some Lake Michigan tributaries . However, several introduced invasive species, such as lampreys, round goby, zebra mussels and quagga mussels, continue to cause major changes in water clarity and fertility, resulting in knock - on changes to Lake Michigan's ecosystem, threatening the vitality of native fish populations . </P> <P> Fisheries in inland waters of the United States are small compared to marine fisheries . The largest fisheries are the landings from the Great Lakes, worth about $13 million in 2003 . Michigan's commercial fishery today consists mainly of 150 tribe - licensed commercial fishing operations through the Chippewa - Ottawa Resource Authority (CORA) and tribes belonging to the Great Lakes Indian Fish and Wildlife Commission (GLIFWC), which harvest 50 percent of the Great Lakes commercial catch in Michigan waters, and 45 state - licensed commercial fishing enterprises . The prime commercial species is the lake whitefish (Coregonus clupeaformis). The annual harvest declined from an average of 11 million pounds (5,000,000 kg) from 1981 through to 1999 to more recent annual harvests of 8 to 9.5 million pounds (3,600,000 to 4,300,000 kg). The price for lake whitefish dropped from $1.04 / lb. to as low as $. 40 / lb during periods of high production . </P>

What species of fish are in lake michigan
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