This is another reason you won't find me in the down under (Australia) as a spider known as dolomedes briangreenei is known to live down there and is the size of your hand palm.
This blue spider floats on top of water and senses vibrations below to detect potential prey which then the spider can even submerge itself underwater for up to an hour to hunt down prey.
Pic and more here.
This blue spider floats on top of water and senses vibrations below to detect potential prey which then the spider can even submerge itself underwater for up to an hour to hunt down prey.
Pic and more here.