Powan (Coregonus lavaretus) is found in the British Isles east into Scandinavia and northern Russia and Siberia. There are both freshwater and migratory (salt and fresh) members of this species. Although this fish can grow to about 28 inches in length, small forms less than 4-8 inches occur.

The whitefish and cisco genus, Coregonus, is found in northern North America and northern Eurasia. These fish are slender, silver colored, and show a deeply forked tail. The mouth is usually small and reaches barely to the front of the eye. There is considerable debate as to the number of real species in the genus, and in many instances these fish are difficult to identify.

The common names of cisco and whitefish add confusion to the naming process. Page and Burr mention 5 Coregonus whitefish species as found in North America, but note that maybe only two real species exist They also note that there are about 7 species of North American ciscos in the Coregonus genus. (The genus Prosopium also contains about 6 species of North American ciscos and whitefish that are not as deep bodied.) Muus and Dahlstrom mention 6 whitefish species found in northern Eurasia.

Members of the Coregonus genus prefer deep water lakes with clear oxygen laden waters, but may also be found in rivers and brackish waters. .

Salmon Family, Salmonidae, is known for the trout and the salmon groups, both of which are considered good sport and table fish. Recently several hybrids have been introduced into the Great Lakes, especially Lake Michigan, with great success as a sport and commercial fish. Salmon and trout are primitive fish and lack bony spines in their fins.

Salmon Group, Order Salmoniformes, is found worldwide in oceans. It is also found in freshwater in many places in North America. A great number of the large game and sport fish are found in this order.

Bony fish, Class Teleostomi, are a class of chordates that include the majority of fish-like animals found on earth. They are characterized by a bony jaw and a bony skeleton. They are found in both fresh and marine waters.

Backboned Animals (Phylum Chordata) are the most advanced group of animals on earth. These animals are characterized by having a spinal cord or backbone. Most members have a clearly defined brain that controls the organism through a spinal cord. Fish, amphibians, reptiles, birds, and mammals are in this phylum.

Currently, some taxonomists believe that the fish should be divided into two groups (sharks and regular fishes) and that there are some other primitive groups in the phylum such as hagfish or lampreys.

Animal Kingdom contains numerous organisms that feed on other animals or plants. Included in the animal kingdom are the lower marine invertebrates such as sponges and corals, the jointed legged animals such as insects and spiders, and the backboned animals such as fish, amphibians, reptiles, birds, and mammals.

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