Bluegill Identification Guide

Key identification features

• Deep, laterally compressed, disc-shaped body typical of sunfish
• Small mouth that does not extend past the front of the eye
• Dark blue-black opercular (ear) flap with no red or orange margin
• Olive to blue-green body with faint vertical bars along the sides
• A distinct dark blotch at the rear base of the dorsal fin
• Coppery or yellow tint on the breast and belly, especially in breeding males

Common look-alikes

• Pumpkinseed sunfish: opercular flap has a bright red or orange spot near the edge, and the body shows more vivid orange spotting
• Redear sunfish: opercular flap is edged in red rather than solid black
• Green sunfish: larger mouth extending to below the eye and a more elongated, less disc-like body

Where you'll see one

Bluegill are native to freshwater lakes, ponds, and slow-moving streams across the eastern and central United States, and have been widely introduced elsewhere for sport fishing. They favor weedy, sheltered shallows near cover such as submerged logs, docks, and aquatic vegetation, often schooling in open water just off the cover during warmer months.