Watch a video on aquatic animals including mosquitoes and midges.
Mosquito populations can usually be controlled by bream and topminnows (often mosquitofish in ponds), which feed upon mosquito larvae. Deepening pond edges and reducing aquatic vegetation will also reduce mosquito populations by eliminating breeding areas.
Midges, mosquito-like insects that live in and around ponds, are often mistaken for mosquitoes. Thousands of midges are sometimes present around fish ponds. They make a noise similar to mosquitoes, but midges are usually larger than mosquitoes, have fuzzy antennae, and do not bite. The larval form of midges is a significant portion of the bluegill’s diet.
Though they look like mosquitoes, midges that live in ponds do not bite.
The above information came from the Alabama Wildlife and Freshwater Fisheries Division's booklet Sportfish Management in Alabama Ponds, which is available as a PDF.