Question: what is the difference between a water roach and a cockroach?
Answer: Size - generally a water bug is bigger than a cockroach. Most cockroaches are between 1 - 1 1/2 inches long. ... Although the term water bug is applied to a wide variety of insects, the Giant Water Bug is often most confused with cockroaches. Some species of roach can survive in water, but they prefer to be on land.