My female frilled lizard just picked my goldfish out of the tank, she didn't hurt it, and then swallowed it whole. I knew she swallowed it because I saw it go down her gullet. Her belly was looking very full (it is quite a large goldfish). Then, after about 5 minutes, she regurgitated the fish back into the tank. The fish is absolutely fine. How did it survive and why did the lizard regurgitate it when she could just have digested it?