How do obligate aquatic true water bugs obtain necessary air while remaining submerged in water?

Answer

Possessing specialized breathing tubes or siphons.

True water bugs are built for aquatic life and use specialized structures, called siphons, which extend to the water surface to draw air while they remain underwater.

How do obligate aquatic true water bugs obtain necessary air while remaining submerged in water?
animalinsectclassificationwater bug