A few extra details there.
But professor of natural history, Paul Brain, said it was possible for it to survive in the colder British climate.
He said: "The crocodile would simply slow down or even shut down for a while during cold weather then spring back to life when the water gets warmer.
"There are a lot of exotic pets out there and this could be one which outgrew its tank and the lake may have been a suitable place to dump it."
A spokesman for Swansea Police said: "We have visited the lake several times and not seen anything - but we are not ruling it out."
Meanwhile in the Daily Telegraph:
Crocodile spotted near Welsh supermarket Telegraph.co.uk, United Kingdom