Bluegills are a freshwater fish, although they will venture into slightly salty water. Bluegills like quiet waters such as lakes, ponds and slow flowing rivers and streams. Bluegills have small mouths and an oval shaped body. The fish is olive green on the upper body and light yellow on its belly. Dark bands run up and down from the back fading into the belly.
Bluegills are a member of the sunfish family.
Spawning takes place from April to September. The male picks a good spot and makes a nest. After the female lays her eggs, the male guards the eggs and newly hatched young. Bluegills like to build their nests around other bluegill nests. Sometimes there are so many nests that the nest beds touch and look like honeycombs.