freshwater
Largemouth Bass
Micropterus salmoides
Robust, torpedo-shaped body with a dark, jagged horizontal stripe along the flanks. The upper jaw extends past the rear margin of the eye. Coloration is typically greenish on the back and sides, shading to white on the belly. It features a spiny dorsal fin connected to a soft-rayed dorsal fin.
- Habitat
- Native to North America, inhabiting warm, clear, vegetat…
- Size & weight
- Typically ranges from 12 to 20 inches and weighs 1 to 5…
- Diet
- Carnivorous ambush predator. Feeds primarily on smaller…
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Physical characteristics
Robust, torpedo-shaped body with a dark, jagged horizontal stripe along the flanks. The upper jaw extends past the rear margin of the eye. Coloration is typically greenish on the back and sides, shading to white on the belly. It features a spiny dorsal fin connected to a soft-rayed dorsal fin.
Habitat & distribution
Native to North America, inhabiting warm, clear, vegetated lakes, ponds, swamps, and slow-moving rivers. They prefer areas with abundant cover such as submerged logs, aquatic weeds, and reeds.
Behavior
Generally solitary and territorial as adults, becoming more active during dawn and dusk (crepuscular). They rely heavily on cover to ambush prey.
Diet
Carnivorous ambush predator. Feeds primarily on smaller fish, crayfish, frogs, insects, and occasionally small birds or mammals.
Reproduction
Spawning occurs in the spring when water temperatures reach about 60 to 65 degrees Fahrenheit. Males construct circular nests in shallow water, court females, and fiercely guard the eggs and newly hatched fry until they disperse.
Ecological role
Acts as an apex or near-apex predator in freshwater ecosystems, helping regulate the population sizes of smaller fish and invertebrate species.
Similar species
Smallmouth Bass (Micropterus dolomieu), which has a smaller jaw that does not extend past the back of the eye and vertical bands instead of a horizontal stripe; and Spotted Bass (Micropterus punctulatus), which has a patch of teeth on its tongue and rows of spots on its lower belly.
Identification tips
Look for the upper jaw extending past the rear edge of the eye and the prominent dark horizontal stripe running down the middle of the body.
Interesting facts
Despite being called a bass, the largemouth bass is actually a member of the sunfish family, Centrarchidae. They possess excellent vision and lateral lines that detect vibrations in the water.