Can Your Figure Out What This Is???

From our day out yesterday, we stopped by at a small lake we drove thru along the road and just explored a li'l bit of the area until hubby found that weird thing in the water. We couldn't figure out what it was! It was something like a jell-o but hard and when you squeeze it, it's like some water coming out. You can see thru it and it sure made us wonder what it really was! Maybe you know...let us know!LoL!