True water bugs, belonging to the family Belostomatidae, use what specific structure to obtain air while submerged?

Answer

A retracted breathing tube resembling a snorkel

Genuine aquatic water bugs breathe by periodically rising to the surface to use a retracted breathing tube which has an appearance similar to a snorkel.

True water bugs, belonging to the family Belostomatidae, use what specific structure to obtain air while submerged?
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