MIAMI BEACH (CBSMiami) – A deadly day on water off Miami Beach after a missing diver was found dead.

The U.S. Coast Guard said the sent a boat to check out reports of a missing diver aboard a boat operated by RJ Diving Ventures on Miami Beach. They said when their crew arrived the missing had been found and her body was on the boat.

According to one of the divers on the charter trip, who did not wish to be named, there were about 40 divers on the boat and all were paired up before they hit the water.

When they came to the surface, one of the divers reported their ‘buddy’ was missing. Divers on the boat were able to locate the woman and recover her body. The boat  then headed back to the marina in Miami Beach.

“She sank right to the bottom because she was wearing weights; it’s very difficult to keep yourself up,” Jaclyn Hesse, a diver on board told CBS4’s Summer Knowles. “If she had taken off her weight belts first and then taken off the BCD she would’ve stayed afloat.”

Miami Beach police, Miami-Dade Police, the Coast Guard and the Florida Fish and Wildlife Conservation Commission are all involved in the investigation.

Police have not released the woman’s name or speculated as to what may have gone wrong.