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Wild About Illinois Fishes!

Family Gasterosteidae - Stickleback Family

Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Gasterosteiformes
Family: Gasterosteidae - Sticklebacks are small, scaleless fishes with several isolated dorsal spines along the back followed by a dorsal fin. These fishes are well-known for their mating behavior and nest-building abilities.
     brook stickleback (Culaea inconstans)
     threespine stickleback (Gasterosteus aculeatus) [nonnative]
     ninespine stickleback (Pungitius pungitius)