Hydaticus fabricii, is a species of predaceous diving beetle found in India, Afghanistan, Myanmar, Nepal, Pakistan, Sri Lanka, China, Indonesia, Iran, Japan, Philippines, Taiwan, Thailand, Vietnam and Australia.

[3] Most authors have grouped at least eight forms: six species and two subspecies under the name H. fabricii, which can hardly be separated according to external characteristics, but can be clearly differentiated according to the male genitalia.

The bristles on the rear edge of the hind tarsal phalanx are quite long on the upper side.

There is a bristle border on the rear edge of the adhesive disc in the fore tarsi of male.

In male, aedeagus is fairly straight and has a tip long bristle plate in penis.