How do you tell the sex of a blue gill?

To determine the sex of a bluegill, look for differences in coloration and body shape. Males typically exhibit brighter colors, especially during the breeding season, with a more vibrant blue or green tint on their heads and a darker body. Females, on the other hand, are usually more subdued in color, often appearing duller and rounder, especially when carrying eggs. Additionally, during spawning, males may display more aggressive behaviors and establish nests.