If you ever come to Washington Iowa, you need to go see the Washington Aquarium. It is the largest in southeast Iowa and it may be the largest in Eastern Iowa as a whole. It has numerous  types of fish and Sharks. There is also a cool display of acient fish and shellfish from when Iowa was an inland sea. Go down South ave B and you should find it. If not, stop and ask anyone of the friendly locals, they would be more then happy to help you out.