The water tiger is found in fresh water and is a fearsome predator. It grabs its prey with its front legs and finely chews it with its jaws. It can even bite people. Water tigers also eat organic waste. The beetle is not only an excellent swimmer but also flies well. It flies mostly at night and is attracted to shiny surfaces, such as automobile motor caps. They mistake such surfaces for water. The beetle can grow to 3.5 centimeters. Similar to the adults, the larvae are also carnivores. When they bite a prey, they pump it full with enzymes which dissolve the innards. Then they suck up the contents of the victim.