Polyrhachis sokolova

This is a species of ant that has been recently discovered to survive tidal inundations, which means they can survive when a body of water rises and spills into normally dry land. They nest in mangrove swamps, which are regularly inundated by the tide. They survive these times because of the pockets of air in their nests. Because of the rising and falling tide, they have to regularly move their eggs, larvae, and cocoons to keep them from drowning in the water trickling in. They spend most of their time repairing the breaks in the nest where the water breaks in. 

They can run across the surface of the water, and also swim just below the surface where they are most likely eaten by fish, mudskippers, and crabs.