Bullfrogs – Bullfrogs are similar to crayfish in that they do best in shallow, heavily vegetated areas containing few predator fish such as bass. Commercial bullfrog culture has not been successful in the United States. Other countries, such as Brazil, raise bullfrogs commercially.
Muskrat and Beaver – These animals do best in shallow, tree-lined vegetated ponds. However, they are not recommended for fish ponds because they can burrow through the dam, causing it to fail. If you want to remove a beaver from your pond contact the ODWC’s Game Division for a Nuisance Beaver Control Permit.
Ducks – Ducks feed on aquatic vegetation in shallow areas. A pond for ducks should have abundant aquatic vegetation. Ducks and other waterfowl add substantial nutrients to the pond and may cause water quality problems for fish. It is best to manage a pond for ducks or fish, not both.