Bullheads prefer small, muddy lakes and calm pools in warm streams. The black bullheads feed on a wide variety of food, primarily aquatic insects but will eat almost anything edible that is available. In Wyoming, bullheads spawn in early summer. Eggs are laid in small depressions. The adults guard eggs and newly hatched fry. When habitat conditions are favorable and predators rare, bullheads have a tendency to produce dense populations of stunted fish.
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