freshwater
Largemouth Bass
Micropterus salmoides
Stout, robust body with an upper jaw that extends well past the rear margin of the eye. Coloration is typically greenish with a dark, jagged horizontal stripe along the flanks. It has a notched dorsal fin separating the spiny and soft rays.
- Habitat
- Freshwater environments such as lakes, reservoirs, ponds…
- Size & weight
- Typical size ranges from 12 to 20 inches, with a maximum…
- Diet
- Carnivorous ambush predator feeding primarily on smaller…
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Physical characteristics
Stout, robust body with an upper jaw that extends well past the rear margin of the eye. Coloration is typically greenish with a dark, jagged horizontal stripe along the flanks. It has a notched dorsal fin separating the spiny and soft rays.
Habitat & distribution
Freshwater environments such as lakes, reservoirs, ponds, slow-moving rivers, and backwaters with abundant aquatic vegetation, submerged wood, or other structures.
Behavior
Solitary and territorial outside of the spawning season. Primarily active during dawn and dusk (crepuscular), using structure for cover while hunting.
Diet
Carnivorous ambush predator feeding primarily on smaller fish, amphibians, crayfish, and large aquatic insects.
Reproduction
Spawns in the spring when water temperatures reach around 60 to 65 degrees Fahrenheit. Males construct circular nests in shallow water, guard the eggs, and protect the newly hatched fry.
Ecological role
Functions as a top apex predator in many freshwater ecosystems, helping to regulate prey fish populations such as bluegill and shiners.
Similar species
Smallmouth Bass (Micropterus dolomieu), which has a jaw that does not extend past the eye and vertical bars instead of a horizontal stripe, and Spotted Bass (Micropterus punctulatus), which has a smaller mouth and rows of spots on the lower belly.
Identification tips
Check the upper jaw extension relative to the eye and look for the characteristic dark horizontal stripe running along the side of the body.
Interesting facts
Despite being called a bass, the largemouth bass is actually a member of the sunfish family, Centrarchidae. They have exceptional eyesight and rely heavily on vibrations sensed through their lateral line to detect prey in murky water.