Bluegill at mantua

[TubeDude]

First trip on the ice today! We didn't have a ton of time but the 3 of us managed about 20 fish in a few hours. Just used the standard ice jig tipped with wax worms. 
I did find something new today that I've never seen. After I got finished filleting the fish, I was giving them a final rinse and noticed a small cream colored object in one of the fillets, it kinda looked like rice breast that ducks get. But with these, when I pulled them out they started to wiggle. After digging them out, they looked like tiny leaches.  Have any of you guys seen this before? 

Those are appropriately just known as "white grubs".  They show up in bluegills...and bass...periodically.  They are not harmful to humans but they look nasty.  Pick them out with a knife blade or cook them well and enjoy some extra protein.  Here is a LINK TO ONLINE INFO

They aren't all that common in Mantua fish but Pelican Lake used to be notorius for them.  But they seemed to go in cycles...being more common some years than others.  I suspect it can be a water quality issue as well as changes in the abundance of the snail and bird host populations.