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Stickleback

The image shown is a representative illustration and does not depict every individual animal in this category.

Total number of species: 16

The stickleback is a small, scaleless fish found in the fresh, brackish, and marine waters of the Northern Hemisphere’s temperate regions. These tiny fish grow average 5-10 cm (2-4 inches) in length and include about eight fish species within the Gasterosteidae family. Cousins to the pipefish and seahorse, sticklebacks are identifiable by a row of 2 to 16 spines in front of their dorsal fin.

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