Regularly stocking fish is a natural way to prevent excessive growth of algae, pond weeds, and pests such as midge flies and mosquitoes. Catch-and-Release Fishing can also be a fun pastime for residents of a community. Bass, Bluegill, and Catfish are popular sport fish. Minnows, Carp, Talapia, and other varieties are great for environmental controls. Goldfish and Koi can be added to beautify small ponds and decorative features