Mudskipper . I never had one as a pet but when I was in the Philipines for 10 years seeing them in the wild on a beach (the small ones) were really hard to catch by hand. They move like lightning on land. It's hard to believe a fish moves faster then me on sand. I did catch one that you see in pet shops ( I think) . I just developed a lot of respect for them
Corydoras! 
