I discovered a large mound of hard, clay mud inside of the automatic pool cover box at my house. I’m not sure but I suspect I might have a crawfish issue. There is a small 3 inch drain hole in the bottom of the cover box that something is coming up through and causing this. I did see a crawfish in there three years ago inside of my pool. The mound of mud is hard and has a small hole in the top. I suppose the issue could also be another animal like moles or voles because I can see evidence and tracks in the grass area of our yard that has been damaged. The inground pool was put in 4 years ago. Further back in our yard is a large storm sewer that several houses drains and yards divert water to. There is a fair amount of water back there when it rains. Just trying to confirm if you think this is probably a crawfish issue and if so, how would I go about remediating it. Thank you. Photos of the mud inside of the cover box and where the drain cover was popped off, and of the crawfish from 3 years ago.