Rusto,
You like oddball fish, and I think you previously expressed a desire to have clearer water in your pond.
Have you considered a paddlefish?
They are native to Kansas in a river not too far from you. I believe they are suspension filter feeders. (I could easily be wrong on this - since their big paddle looks like it would be great at stirring up the bottom sediments and THEN feeding on the suspension.)
Someone recently posted a photo on Pond Boss of a paddlefish for sale at their fish supplier.
If you start researching them in a pond, you definitely need an expert opinion (rather than mine). The fish supplier that has them might be a good source of data for how they affect the ecology of a pond.
