There are lots of things creeping around outside my house.
Geckos often wake me up during the night with their barking. I don't have any photos of them yet, though.
There are mongooses on all the Hawaiian islands except Kawaii. They were imported to catch rats, but in addition to the rats they also gobbled up many native species of birds and insects. People here seem to like them, though.
And... I haven't seen any actual jellyfish, but once in a while this sign appears on the beach. I find it much scarier than any of the warnings about currents or waves.