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No, there is no such thing as a giant water beetle.

Specifically, a beetle has chewing mouthparts, leathery forewings, and membranous foldable hindwings. It meets its dietary needs by feeding upon animal and plant materials. It undergoes complete metamorphosis in that its larvae and adult stages look dissimilar.

A bug has piercing mouthparts and membranous wings (when present). It looks to maintaining a liquid diet from plant (and sometimes animal) fluids. It undergoes incomplete metamorphosis because juveniles constitute immediately recognizable, smaller, wingless (when present upon maturity) versions of adults.

Bugs are members of the order Hemiptera. Beetles belong to the order Coleoptera. Giant water bugs exist in the bug order whereas no known giant water insect will be found in the beetle order.

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12y ago

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