|Scientific Name||Gasterosteus aculeatus|
|Conservation Status||Least Concern|
|Habitat||North Pacific and Atlantic Rims|
|Food||Plankton and Small fish|
The three-spined stickleback, Gasterosteus aculeatus, is a fish native to much of northern Europe, northern Asia and North America. It has been introduced into parts of southern and central Europe, including Belgium, where the species was featured on a 14-franc postage stamp issued in Belgium in 1990.
The anadramous form spends most of its adult life eating plankton and fish in the sea, and returns to freshwater to breed.