Origin of the Bluegill Name
The bluegill (Lepomis macrochirus), also known as copper nose, blue sunfish, or bream, gets its name from the bluish-green coloring on the sides of its head, body, and gill covers.
This coloration comes from a pigment called cyanin in the skin cells. The bluegill's scientific name also reflects its traits: Lepomis means "scaly gill cover," and macrochirus means "large hand," referring to its large pectoral fins.
Coloration can vary with environment, diet, and emotional state, with males often showing brighter colors during breeding season.
Bluegills are popular freshwater game fish found in ponds, lakes, rivers, and streams throughout North America.