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Being most amenable, the stickleback flourishes in freshwater, saltwater and in
varying degrees of brackish water. It especially favors places around
eelgrass beds and pilings. Armored with thin bony plates, instead of
scales, the Stickleback is quite small, often being less than 4 inches long.
The Stickleback spawns mostly in freshwater, where a male builds a nest and
guards the eggs.