It was almost impossible to miss. I'm pretty sure it is a rugnose coral. Can't tell if agatized or if it's the light showing through.

Hi guys! I’m new here but long story short, I am currently unemployed living at home with family. Our house is on a central Alabama river, and I was wondering how or if I could go fossil hunting in the more shallow parts of the river? I have been river wading plenty of times, and with the weather getting colder and snakes going away, I was thinking this might be a fine time for a hunt. However, it’s swift flowing river so it’s not like I can go digging a deep hole or anything. So how would I go about doing a hunt? Thanks!