Amazing footage here too! That looks like a huge fish (a fully grown/adult Alewife?) the bird caught! The fish was struggling at first, but the hungry Heron managed to fully consume it all okay? It looked like the unlucky thing was still desperately kicking going down that long neck! I wonder, does this particularly fit fish stand any chance of escaping if eaten in that condition? It seems quite frantic to get out of the stomach Maybe it can turn around inside the elastic throat/stomach and has a chance of survival here.