- water bug - a true bug: large aquatic bug adapted to living in or on the surface of water
--1 is a kind of heteropterous insect
--1 has particulars:giant water bug; water scorpion; water boatman, boat bug; water strider, pond-skater, water skater - German cockroach, Croton bug, crotonbug, water bug, Blattella germanica - small light-brown cockroach brought to United States from Europe; a common household pest
--2 is a kind of cockroach, roach
--2 is a member of Blattella, genus Blattella - German cockroach, Croton bug, crotonbug, water bug, Blattella germanica - small light-brown cockroach brought to United States from Europe; a common household pest