A group of researchers and fishermen caught a 37.5 kilogram shark in the central province of Binh Dinh on Monday evening.
The researchers from the Institute of Oceanography in Nha Trang and four local fishermen netted the shark off the coast of Quy Nhon City.
The 1.78 meter-long shark will be brought to the Institute of Oceanography in Nha Trang for study purposes, local officials said.
The researchers were on a sixth field trip under a project called "Studying shark attacks in Quy Nhon Waters" conducted since August 2010, after shark attacks were first reported in July 2009.
The project is jointly carried out by the institute and Binh Dinh Province.
The researchers, accompanied by local fishermen, said they did not succeed in netting any shark in previous trips.
The shark was identified as the graceful shark or Queensland shark (Carcharhinus amblyrhynchoides) - a species of requiem shark, family Carcharhinidae, found in the tropical Indo-Pacific from the Gulf of Aden to northern Australia.
The International Union for Conservation of Nature (IUCN) has listed the shark species as "Near Threatened".
At least three shark attacks that left six locals and tourists injured were reported between July 2009 and May 2010 in Quy Nhon.
Five sharks, one of which weighed more than 500 kilograms, have been caught in the warm waters of Quy Nhon since February 2010.