When I was three, I tried to keep one that my sister had caught when I was living back on Siesta Key.
However, rather than putting it in my dad's fish tank, I put it in our swimming pool.
Poor guy never stood a chance
Therefor, to make this post of substantial take-away value rather than random, idiotic, and slightly disturbing, I will provide my brilliant insight:
One will probably survive in a large enough tank; however, make sure it is not filled with chlorine.
...or pool toys.
...or inflatable rafts.