freshwater
Largemouth Bass
Micropterus salmoides
Stout, robust body with an elongated shape. The upper jaw extends well beyond the rear margin of the eye. Coloration is typically greenish with a dark, jagged horizontal stripe along the flanks. Dorsal fin is deeply notched between the spiny and soft rays.
- Habitat
- Freshwater lakes, reservoirs, ponds, slow-moving rivers,…
- Size & weight
- Typical size range is 12 to 20 inches, weighing 1 to 5 p…
- Diet
- Carnivorous ambush predator feeding on smaller fish, cra…
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Physical characteristics
Stout, robust body with an elongated shape. The upper jaw extends well beyond the rear margin of the eye. Coloration is typically greenish with a dark, jagged horizontal stripe along the flanks. Dorsal fin is deeply notched between the spiny and soft rays.
Habitat & distribution
Freshwater lakes, reservoirs, ponds, slow-moving rivers, and wetlands with abundant aquatic vegetation, submerged wood, or other structures.
Behavior
Solitary and territorial outside of the spawning season. They are primarily active during dawn and dusk (crepuscular) and use cover to ambush prey.
Diet
Carnivorous ambush predator feeding on smaller fish, crayfish, frogs, insects, and occasionally small birds or mammals.
Reproduction
Spawns in the spring when water temperatures reach 60 to 65 degrees Fahrenheit. Males construct circular nests in shallow water, guard the eggs, and protect the newly hatched fry.
Ecological role
Apex freshwater predator that regulates prey populations such as smaller fish, amphibians, and crayfish, helping to maintain balance in aquatic ecosystems.
Similar species
Smallmouth Bass (Micropterus dolomieu), which has a jaw that does not extend past the back of the eye and vertical bars instead of a horizontal stripe, and Spotted Bass (Micropterus punctulatus), which has a lower jaw that does not extend past the eye and a rough patch on the tongue.
Identification tips
Look for the large jaw extending past the eye and the characteristic dark horizontal stripe running along the side of the body.
Interesting facts
Largemouth bass are the most popular freshwater game fish in North America and possess a remarkably strong sense of vision and lateral line vibration detection to locate prey.