This lifeform is found in the northern Atlantic Ocean. This lifeform is found in northern Eurasia. This lifeform is found north of the Mason Dixon line in North America. This lifeform is found in the northern Pacific Ocean (Aleutian Islands, etc.). This lifeform is common in suitable environments.

Three spine stickleback (Gasterosteus aculeatus) can be found in both marine and freshwater environments. This widespread species is found in the New World from Alaska south to Baja Calfiornia and from Hudson Bay south to Chesapeake Bay and even further inland to Lake Ontario. This fish is also found in Europe, Greenland, and the Pacific Coast of Asia. It can grow to about four inches in length.

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.