The USCG confirmed the body, wrapped in a plastic trash bag, was found in the water 13 miles out from Egmont Key, at the mouth of the Tampa Bay, at about 12:40 p.m. on Saturday.

According to Fox13, witnesses who found the body said they had been spear-fishing and discovered the bag when they were readying to change location.

They picked up the bag, believing it to be trash, and soon realized there was something inside.

The network reported the fishermen cut open the bag and saw skin, as well as what they believed was a bra strap or bikini.

According to the National Missing and Unidentified Persons System (NamUs), 600,000 people go missing every year.

Some 4,400 unidentified bodies are recovered each year. Of those, 1,000 bodies remain unidentified after 12 months.

The USCG was alerted at about 11 a.m. and the body was found 13 nautical miles out in the water, according to the Tampa Bay Times.

USCG servicemen and St. Petersburg police assisted in retrieving the woman’s body from the ocean.

FBI officials are leading an investigation into the discovery of the body, although no further information has been revealed.

The woman has not been identified and it is not clear how long the body had been left in the ocean.

Newsweek has contacted the USCG for comment.

In August, DNA samples were taken from a body found in a barrel after water levels plunged in Lake Mead.

A Clark County Office and Strategy official announced that the remains found near Callville Bay on May 7 have been identified by the Office of the Coroner/ Medical Examiner as those of Thomas Erndt.

His body was found by paddle boarders who came across his skeleton in the mud and was positively identified using DNA analysis, although his cause of death was not determined.

DNA testing works by comparing any residual DNA found inside human remains with reference samples found in the person’s home, or from close family members. Lake Mead, a reservoir of the Colorado River, was formed by the construction of the Hoover Dam in the 1930s.

It has seen dramatic drops in water levels caused by the drought that blighted the Southwest.

Lake Mead, which lies across Nevada and Arizona, made headlines this year due to multiple bodies being found as the water levels fell.

Human remains have been uncovered since May, and shipwrecks once concealed by the water have also emerged.