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 water boatmen, a term that is sometimes used in the United Kingdom for Notonecta glauca, an insect of a different family, Notonectidae. Corixa punctata is the "lesser water boatman".