When Mr Hammond tasks Andy with making sure the marine iguanas are clean for their inspection, Andy mistakenly thinks that Mr Hammond is referring to the iguanas living in the reptile house. They are of course two different species. Not knowing the answer, Andy jets off to the Galapagos Islands to find out how marine iguanas keep themselves clean and gets quite a surprise when he discovers the truth. Along the way, he has a run-in with some racer snakes and gets help from a baby marine iguana to make his escape. But will Andy make it back in time before Mr Hammond notices he’s gone?