The vessel Prodiver Maui sank in waters by Molokini Crater on Wednesday morning, July 17, the Coast Guard confirmed.
All aboard were rescued by a Good Samaritan vessel that has not been identified. The Coast Guard received a distress call but were not involved in the rescue.
Contrary to previous media reports, there were eight people rescued; one captain, one crew, and six passengers, said Coast Guard Lieutenant Kevin Cooper.
The Prodiver Maui vessel specializes in scuba diving excursions. The company did not immediately respond to inquiries.
A crew member on the recreational vessel Pride of Maui which was also in the area that day described conditions as extremely rough, with many passengers experiencing sea-sickness.
Lt. Cooper said the Coast Guard is investigating this serious marine incident.
The Coast Guard wont handle the removal of the sunken vessel but will act as the federal on-scene coordinator, says Cooper, and ensure the owner/responsible party cleans up any oil or fuel that may leak from the vessel.