Warmouth Identification Guide

Key identification features

• Chunky, robust sunfish body, deeper and heavier-looking than most Lepomis species
• Large mouth that extends back past the eye, with a slightly protruding lower jaw
• Reddish-orange eyes and 3-5 dark brown lines radiating outward from the eye across the cheek
• Mottled olive-brown to dark brown body with irregular blotching, often with a purplish sheen
• Short, rounded ear flap (opercular flap) that is dark with no pale margin

Common look-alikes

• Rock bass - similar chunky shape and red eye, but has six anal fin spines (warmouth has only three) and a more silvery-bronze color.
• Green sunfish - more elongated body, blue-green wavy streaks on the cheek, and a smaller mouth that doesn't reach past the eye.
• Bluegill - small terminal mouth, no radiating eye lines, and a dark ear flap with a pale edge.

Where you'll see one

Warmouth favor slow, heavily vegetated warmwater habitats such as swamps, weedy pond margins, oxbows, and sluggish creeks, usually hiding around cover like logs, stumps, and lily pads. They range through the eastern and central United States, from the Great Lakes basin south to the Gulf Coast.