Lets look at crawfish and see if they are right for your lake. First they will thrive in lakes with vegetative, rocky, or wood cover, lack of cover equals short life expectancy due to predation. Crawfish do need excellent water quality so bottom diffusion aeration is preferred. Crawfish are omnivours, which means they can and will eat anything. Insects, fish, plants, and detritus (decaying matter on the lake bottom) will all become food for crawfish so you don't need to do anything special to feed them. Depending on the species they will reproduce by burrowing therefore leevee lakes may not be the best lakes to build dense crawfish populations. I have read conflicting studies on the amount of protein a crawfish consist of and therefore how well bass grow on crawfish diets. What I do know based on my personal experience is that at the end of the year bass in lakes stocked with crawfish have higher relative weights and that is something everyone wants.
Thank you for reading and Happy Fishing!!!
Steven Bardin M.S.