Usually olive-colored with a purple luster, greenish stripes, and a large black spot at the rear of the dorsal fin. The sides of its head and chin are commonly a dark shade of blue, hence the name “bluegill”. Bluegills are most commonly found in lily ponds and around docks and boat landings. A favorite of both fly and bobber fisherman, the freshwater Bluegill is the most popular freshwater sport fish in the U.S. and is known as a tasty pan fish (just the right size for frying whole in the pan). State regulations apply, but “keeping size” is generally the span of your hand or larger.