Three-spined stickleback (Gasterosteus aculeatus)

General data
- Main name: Three-spined stickleback
- Climates: Temperate, Continental, Subpolar
- Habitat: Freshwater
- Native: Europe
- Distribution: Danube, Caspian Sea, Baltic sea, Don, Yukon, Lima, View all... River Wye, Daugava (Western Dvina), Klamath River, Mezen, Northern Dvina, Neman (Nemunas), Guadalquivir, Lielupe, Venta, Gauja, Lake Washington, Russian River (California)
Classification
- Genus: Gasterosteus - Sticklebacks
- Family: Gasterosteidae - Sticklebacks
- Order: Gasterosteiformes - Sticklebacks
- Class: Teleostei - Ray-finned fishes
- Superclass: Osteichthyes - Bony fishes