freshwater
Bluegill
Lepomis macrochirus
Deep, compressed, oval-shaped body; small mouth; distinct dark opercular flap (ear flap) without a light border; vertical bars along the flanks which may be faint depending on mood or water clarity; dark spot at the posterior base of the dorsal fin.
- Habitat
- Warm freshwater lakes, ponds, slow-moving rivers, and st…
- Size & weight
- Typically 4 to 12 inches (10 to 30 cm) in length and wei…
- Diet
- Insects, small crustaceans, aquatic worms, small fish, a…
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Physical characteristics
Deep, compressed, oval-shaped body; small mouth; distinct dark opercular flap (ear flap) without a light border; vertical bars along the flanks which may be faint depending on mood or water clarity; dark spot at the posterior base of the dorsal fin.
Habitat & distribution
Warm freshwater lakes, ponds, slow-moving rivers, and streams with abundant aquatic vegetation, submerged logs, or structures.
Behavior
Forms loose schools, particularly juveniles and sub-adults; adults often establish and defend small breeding territories in colonies during spawning season; diurnal.
Diet
Insects, small crustaceans, aquatic worms, small fish, and occasionally plant material, feeding primarily by sight during daylight hours.
Reproduction
Males construct circular nest depressions in shallow sandy or gravelly substrate, spawning with multiple females in colonies during the warm spring and summer months.
Ecological role
Acts as an important prey species for larger predatory fish and wading birds, and helps control invertebrate populations.
Similar species
Pumpkinseed (Lepomis gibbosus), which features wavy turquoise lines on the cheek and an opercular flap with a bright red or orange margin; Green Sunfish (Lepomis cyanellus), which has a larger mouth and a more elongated body.
Identification tips
Look for the distinct dark ear flap lacking a bright red or orange border, the dark spot near the back of the dorsal fin, and the small mouth.
Interesting facts
Bluegills are known for their strong parental care where males aggressively guard the nests and eggs from predators until the fry hatch and disperse.