what is in the trap outside of the tadpole?

We have about 7" of pretty good ice on our pond and I have been aggressively clearing and flooding to add inches. We had a army of skaters come over on Saturday and the quad that we used to clear it went near the edge of the bank where the ground heat from the banks keeps the ice a bit on the thin side and created a slight pressure crack. Due to the weight of the skaters and the quad, water started coming up that crack. About an hour later there was about 3" of standing water on top of the ice, just around that edge and suddenly up through the crack swims a bullfrog tadpole. He/she looked disoriented but didn't seem to mind the water temps and seemed pretty vigorous. We ended up opening another hole elsewhere and putting him back in the pond.

I wonder if they seek light, oxygen or just are curious?