Belostoma is a genus of insects in the hemipteran family Belostomatidae, known colloquially as giant water bugs.

[5] Bugs of the genus Belostoma prefer lentic habitats with submerged or emergent vegetation and for overwintering the adults fly to ponds and slow-moving waters.

During the springtime and the early summer they often fly to electric light-sources, thus they are also called "electric-light-bugs".

They stalk their prey by hanging head downwards under the water surface, striking using the rostrum and injecting digestive saliva.

[8] The following species belong to the genus Belostoma: i c g b Data sources: i = ITIS,[9] c = Catalogue of Life,[10] g = GBIF,[11] b = Bugguide.net[12]