Smallmouth Bass (Micropterus dolomieu) lives in freshwater lakes across Eastern North America. It feeds on crayfish and insects. Its conservation status is Least Concern.
Fascinating facts about the Smallmouth Bass
- The smallmouth bass can grow to about 27 inches (69 cm) in length and reach a weight of up to 12 pounds (5.4 kg), making it the largest individuals recorded for the species. Such dimensions are rare but documented in the wild, where the fish's muscular fusiform body enables powerful swimming and ambush predation.
- The all-tackle world record for a smallmouth bass stands at 11 pounds 15 ounces (5.41 kg), caught in Dale Hollow Reservoir on the Kentucky-Tennessee border in 1955. This historic catch remains the benchmark for the sport, illustrating the species' potential to approach the upper limits of its size range. Anglers still reference this record when targeting large specimens, using it as a goal for competitive tournaments and personal achievement.
- During colder periods smallmouth bass may migrate long distances, travelling up to 12 miles in a single day through streams, creeks or rivers. Such daily journeys contribute to overall migrations that can exceed 60 miles as the fish seeks deeper pools for semi-hibernation when water temperatures drop below 16 °C (60 °F).
- Because it cannot tolerate polluted water, the smallmouth bass acts as a natural gauge of water quality, signalling a relatively healthy ecosystem. It thrives in clearer streams, rivers and rocky lake areas where the water is clean, and its intolerance makes its presence a reliable warning sign. Although sensitive, it endures conditions that would defeat most trout, showing a modest resilience beyond many other fish.
- The species prefers cooler water than its largemouth cousin and therefore seeks deeper, faster-moving sections in summer. During hot months it moves to cooler, deeper currents where it can exploit stronger flows that other black bass avoid. This habit allows it to inhabit streams and rivers with robust currents, giving it a niche where many competitors cannot thrive.
Sources
Every fact above was checked against these pages, and kept only where one of them states it.
At a glance
RangeEastern North America
HabitatFreshwater lakes
DietCrayfish and insects
About the Smallmouth Bass
In the sun-dappled depths of North America's freshwater lakes and rivers, the smallmouth bass glides with stealthy precision, its mottled brown and green scales blending seamlessly into the surrounding landscape. With a flick of its powerful tail, it darts between submerged boulders and tangled aquatic vegetation, its sharp eyes ever-vigilant for the next unsuspecting meal. As it navigates the intricate web of underwater currents and eddies, the smallmouth bass embodies a paradox of delicate beauty and formidable predatory prowess.
Hear the Smallmouth Bass, and 4,400+ more
Real recorded sounds, 11 nature games and a free Daily 5, 1v1 quiz duels, conservation wins and a safe Kids mode. Free on Feravox.
