Who do you think won this costume contest?
Scuba divers donned their best Halloween looks for an underwater event off the Florida Keys.
[Ads /]
Divers submerged 30 feet to compete in the contest at the Florida Keys National Marine Sanctuary.
Rainbow Reef Dive Center hosted the event -- and offered social media users a chance to vote for their favorite costume on their Instagram.
[Ads /]
The top three votes will be announced later today.
They will be rewarded with dive equipment and dive trips.