I think crawfish are a little over rated as forage. One tends to get a vision of great numbers of them walking along the pond bottom, and bass feeding on them. This isn't the way it works. Crawfish immediately dig in where they's safe from predation. They are highly territorial. They venture out of their hole warily, but get a little careless during the spawn. Most forage will be from the numerous young that haven't found a territory.
Having said that, crawfish can still make up an important part of a diverse forage base, even if eaten in relitavely small numbers.
