What did I dig up with my Excavator that no one saw??

First of all in case you missed the original videos here is PART 1 and PART 2 of repairing two major pond dams with our Bobcat e42 Mini Excavator and our Bobcat T650 CTL/Skid steer. Since no one mentioned it in the comments, lets take a look back at one clip to see just what I dug up from within the pond dam! And no, it was not the crayfish! (Which I also dug up). Thanks for watching here are the two links:
PART 1 FIXING POND DAM LEAKS: https://www.youtube.com/watch?v=PxF-1mZWtNs&t=923s

PART 2 FIXING POND DAM LEAKS: https://www.youtube.com/watch?v=A-qvcm-R2rg