Just this week I picked up a few Fundulus diaphanus Banded killifish from the Susquehanna River just north of Marietta, PA. They seem to be very common in slow, warm water. They are also rather fast fish and hard to catch. I kept two of which the larger one (3.5 in) is still OK. The smaller one (1.5 in) apparently became food for the 5 in redfin pickerel.
I'd love to have a school of them but I suspect I am going to need the bigger ones if they are to coexist with the redfins.
Dean
Dean, I think full grown diaphanus will still just end up as feeders with a 5 inch or larger redfin.