These guys are great at identifying minnows. Around here most people call both mummichogs and banded killifish, bull minnows. They are both very hardy and make great live bait. I think they are both known for mosquito control in ponds.
I have seen thousands of banded killifish (I think that's what they are) 'shoaling' which is like rolling all over each other in a big school. I see this in May or June. I will be keeping my cast net in the truck.
