freshwater
Bluegill
Lepomis macrochirus
Deep, compressed, oval-shaped body with a small mouth. Olive-green to brownish back, yellowish-orange belly, and vertical bars along the sides. Features a distinct dark black opercular flap (ear flap) with no lighter margin, and a dark spot near the back of the dorsal fin.
- Habitat
- Freshwater lakes, ponds, slow-moving streams, and reserv…
- Size & weight
- Typically ranges from 4 to 10 inches in length and weigh…
- Diet
- Opportunistic carnivore feeding primarily on aquatic ins…
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Physical characteristics
Deep, compressed, oval-shaped body with a small mouth. Olive-green to brownish back, yellowish-orange belly, and vertical bars along the sides. Features a distinct dark black opercular flap (ear flap) with no lighter margin, and a dark spot near the back of the dorsal fin.
Habitat & distribution
Freshwater lakes, ponds, slow-moving streams, and reservoirs, often found around aquatic vegetation, submerged logs, docks, and rocky structures.
Behavior
Social, highly adaptable fish that often forms loose schools. Generally diurnal and active during daylight hours, seeking cover in vegetation or deeper water at night.
Diet
Opportunistic carnivore feeding primarily on aquatic insects, insect larvae, small crustaceans, snails, and zooplankton.
Reproduction
Spawns in colonies during the spring and summer when water temperatures rise. Males construct saucer-shaped nests in shallow water gravel or sand and aggressively guard the eggs and fry.
Ecological role
Acts as an important link in the aquatic food web by consuming insects and zooplankton while serving as prey for larger piscivorous fish, birds, and mammals.
Similar species
Pumpkinseed (Lepomis gibbosus) which has turquoise markings and a red-edged ear flap; Redear sunfish (Lepomis microlophus) which has a red or orange margin on the opercular flap.
Identification tips
Look for the solid dark black ear flap without a light border, a dark blotch at the base of the rear dorsal fin, and a relatively small mouth that does not extend past the eye.
Interesting facts
Bluegills are part of the sunfish family Centrarchidae and are exceptionally popular among recreational anglers due to their strong fighting pound-for-pound nature. Males take on much brighter coloration during the peak of the spawning season.