Hydrovatus acuminatus, is a species of predaceous diving beetle found in Oriental and African regions.

[1][2] It is found in many countries including; India, Sri Lanka, Indonesia, Myanmar, Turkey, Iran, Iraq, Saudi Arabia, Egypt, Gambia, Sudan, Ethiopia, Nigeria, Ghana, Malawi, Tanzania, Namibia, Mozambique, South Africa, Madagascar, Seychelles, China, Japan, Taiwan, Thailand, Cambodia, Vietnam, Malaysia, Singapore, Philippines, and Micronesia.

[3][4][5] Body length is about 2.3 mm.

Both dorsum and ventrum are yellowish brown.

Pronotum and wing-case are sparingly and finely punctate.