For the first time this season, I just caught a few CC and a few Yellow Mud Cats. The CC (#7, #6 and #4 lbs) were fine. However, the Mud Cats have what looks like little tiny white larva spots throughout the fillets. I shot a sickly Mallard duck with something akin to these spots in the meat once upon a time. I'm afraid to eat the meat no matter. What are these spots? Water temp is 75* degrees. thanks