I suspect that you found a toad in your swimming pool. As to why you caught it, a toad will drown if it can't get back out of the pool.
(You saved the little criter's life)
I don't know which end of Tennessee you are in, but unless you are in the mountains, you haven't had a freeze yet.
Your toad buddy will be just fine as long as he stays out of your pool.
Besides, it's not going to get good and cold until after Christmas, although the forecast for Tennessee is wetter and colder than normal.
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