Corixidae is a family of aquatic insects in the order Hemiptera. They are found worldwide in virtually any freshwater habitat and a few species live in saline water. There are about 500 known species worldwide, in 55 genera, including the genus Sigara.

Members of the Corixidae are commonly known as lesser water boatmen: the term used in the United Kingdom to distinguish species such as Corixa punctata from Notonecta glauca, or greater water-boatman, an insect of a different family, Notonectidae.

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