A Mud Skipper is a fish that can walk and breathe out of water. Amazing huh! Yep, the Mud Skipper is a cool animal. It is a cross between a fish and an amphibian. In fact, the Mud Skipper has both gills and an amphibian type breathing system.
You can own your own piece of evolution for only $7 plush S&H ! I'm serious!
Here's a link to a retailer of live Mud Skippers that you can keep in your own aquarium at home!