Dytiscus latissimus is a large species of aquatic beetle in family Dytiscidae.

[1] One of the largest representatives of the predaceous diving beetles of the family Dytiscidae (its maximum size only exceeded by the Brazilian Megadytes ducalis),[2] D. latissimus can reach a length around 38–44 mm (1.5–1.7 in).

This voracious predator hunts a wide variety of prey, including other insects, tadpoles, and small fish.

It is an aquatic species and it inhabits in dense vegetation, mainly of Carex and Equisetum, at the edges of lakes or in nonflowing waters and deep ponds.

They key parameter of the habitat is the abundance of case-making caddis flies, which serve as the primary food for D. latissimus larvae.