Did the corpse salvager in the novel really exist in reality?

In novels, the term " corpse salvager " usually referred to people engaged in illegal activities who used their professional skills to search for missing people underwater or in the air and salvage them. However, the corpse didn't exist in reality. It was just an imaginary element in novels or fictional stories. People may disappear or die due to various accidents or man-made reasons, including suicide, war, kidnapping, etc. Under such circumstances, the government and public safety agencies would usually take various measures to search for missing people, including searching the oceans and rivers, searching underwater caves and ruins, etc. These search operations usually required professional skills and equipment such as divers, ships, aircraft, and underwater equipment. Although the corpse salvager in the novel may be an imaginary element, many storylines stem from people's fear and curiosity, dissatisfaction with social reality, and fictional storylines.