One of the lakes i fished this winter and plan to fish this summer had never ending spikes on the bottom across the main lake basin. Each one was about two to three inches high and about six inches apart all set into a muddy bottom. To me they looked like old cattails but the only thing about that is they would have to be at least 23 years old at this point. Just wondering if that is what they are or if anyone knows what else would make them. They look like they might be a bitch to drag crankbaits through.