Duluth, Minnesota four Catholic schools with coverage up to grades 6 or 8, two Protestant schools, two Montessori schools, and six other charter and private schools. Due to its proximity to the Great Lakes, Duluth is the location for the Large Lakes Observatory. The Large Lakes Observatory operates the largest university-owned research vessel in the Great Lakes, the R/V Blue Heron. Built in 1985 for fishing on the Grand Banks, the Blue Heron was purchased by the University of Minnesota in 1997, sailed from Portland, Maine, up the St. Lawrence Seaway to Duluth, and converted into a limnological research vessel during the
Duluth, Minnesota along the Duluth waterfront. The Great Lakes Aquarium is in the Duluth Waterfront Park. A freshwater aquarium, it features animals and habitats found in the Great Lakes Basin and other freshwater ecosystems such as the Amazon River. The aquarium houses 205 different species of fish, birds, reptiles, amphibians and mammals. It is one of the few aquariums in the United States to focus on freshwater exhibits. The 16-acre Lake Superior Zoo offers year-round recreational activities and features animals from around the world, including Amur tigers, snow leopards, African lions, brown bears, kangaroos, and gray wolves, plus a variety of birds,