Ferocious water bugs, also known as toe biters are large predatory bugs.
As the name implies these bugs really are ferocious predators who will eat anything they can overpower, invertebrates, fish, amphibians, snakes and baby turtles.
Ferocious water bugs are ambush predators, they lie in wait until something comes close and then they catch it.
The bite of the ferocious water bug is considered to be the most painful of any insect bite. One will not, however, die from it or suffer permanent damage.
The Attack of the Giant Water Bug – Scientific American Blog Network.
The Ferocious Water Bug,
GIANT WATER BUG