How to Determine the Gender of Bluegills

Bluegill fish, which are sometimes called bluegill sunfish, sun perch or blue sunfish, feature bluish-green scales on both sides of its upper body and yellowish-orange scales on its belly. Its top fins feature sharp spikes that taper down to a rounded fin on its back. You can determine the gender of a bluegill by looking at its coloring. Making a gender determination regarding this fish may be helpful for breeding, especially if you plan to stock a pond and hope for the fish to reproduce.

Instructions

1. • 1

     Look at the bluegill fish's underbelly. This is located directly beneath its chin, toward the front section of the body.

   • 2

     Identify the bluegill as a male if the scales look bright orange.

   • 3

     Classify the bluegill as a female if the scales look pale yellow.