A Mudskipper Battle - South Africa.

The mudskipper is truly an air-breathing fish. Modified gills work like a simple lung, so he can chase insects on land. His brawny fins enable him to walk, climb, and even leap two feet in the air. Though he's equipped to go anywhere, mudskippers have territories. And this guy's trespassing on an adjoining mudflat. His neighbor's not a happy skipper. Challenge accepted. The intruder makes a sucker out of his opponent. The goal isn't to harm, but to scare him into giving up his turf. But the neighbor breaks his hold, rebuffs him, and declares victory. The intruder sulks off into his lair.