Warmouth Lepomis gulosus

Type of Animal:

Muddy bottom swamps, muddy/mucky bottom marshes, vegetated muddy bottom lakes, slow-moving streams, quiet vegetated areas of muddy bottom streams, canals, streambanks, pond banks, vegetated ponds, rivers w/ ample vegetation/brushpiles, slow-moving backwater streams w/ stumps/ample vegetation/brushpiles, areas around aquatic vegetation/stumps/snags, slower-moving polluted river areas, sluggish waters w/ dense detritus/vegetation/brushpiles/stumps/structure(even barrels/discarded tires), shallow weed beds, backwater impoundments w/ adequate cover, medium to large streams w/ aquatic vegetation/submerged roots/brushpiles, reservoirs w/ vegetation cover, well-vegetated oxbows w/ submerged roots/brushpiles, clear well-vegetated shallow marshes w/ submerged roots/brushpiles, swamps w/ vegetation/riprap cover, Carolina bays, do well in clear & turbid water, prefer freshwater but sometimes found in brackish waters/saline river areas

Native to Mississippi River basin, Ohio River basin, Great Lakes, all SE US & northward to Chesapeake Bay & westward to Rio Grande as well as NE Mexico bordering Texas & S Ontario near Great Lakes. Introduced as far NE as New York, all of Texas, much of New Mexico, Arizona, Pacific coast states, Colorado, Kansas, & Idaho. May be expanding throughout S Canada. Also introduced in Puerto Rico.

Dark fish w/ shiny mottled brown coloration, golden belly, male has bright-orange spot at base of dorsal fin, breeding males have redder eyes, warpaint style pattern, deep compressed lateral body

Other fish, insects, mollusks, zooplankton, crayfish, shrimp, aquatic insect larvae, isopods, copepods, water fleas, grubs, angleworms

Status in Wild:

Extra measures being taken to monitor Canadian populations

Solitary or schools of 10-20 fish. Males nest either solitarily or in close proximity w/ 6-8 other males. Breeding males guard eggs/newly hatched fry.

Additional Info:

Young: Fry/Fingerling
Group: School
Male: 0.44-2 lbs
Female: 0.4-1 lb
3 days 

Life Span:
6 years

Body Length:
Male: 6-12 in
Female: 3-8 in
Young: 1 in

Main predators are larger fish, snakes, turtles, birds, crocodilians, & otters.
Fry leave dad at 5-6 days old.
Spawning season lasts from May-July.
Females can produce anything from 4,000-63,000 eggs per spawning season & often lay eggs in multiple nests. Each nest often has eggs from multiple females.
Reach maturity at close to a year old.

Fun Fact(s):
Males guard eggs aggressively, even charging at people who come too close.
Called warmouth due to either markings resembling warpaint or it’s big mouth-“mouth so big you could have a war in it.” Known by many names-redeye, google-eye, red-eyed bream, stump knocker, mudgapper, mo-mouth, morgan, molly, rock bass, open mouth, weed bass, wood bass, strawberry perch, & mud bass.

Leave a Reply

Your email address will not be published. Required fields are marked *