PTERYGOTE insects originally evolved as terrestrial animals, but various families of Hemiptera have since colonized aquatic habitats. Corixids live on the bottom, feeding mainly on algae and detritus.

Cockroaches are part of the order Blattodea (which also contains termites) and water bugs belong to the order Hemiptera (think: insects like cicadas). Meet the experts: Scott O’Neal, Ph.D. an ...