This is the moment some brave snorkellers took to the water surrounded by a dozen hungry sharks.

In the clip, which was filmed earlier this month in the Bahamas, the 2.5-metre reef sharks swirl around the water looking for food, just inches from the snorkellers.

Although it might look dangerous, the video was captured under the supervision of professionals and shark behaviour specialists who are taking part in a programme to promote shark conservation in the Bahamas.

"Such beautiful creatures," said filmer Chad Sinden who owns a local dive centre.

Although this looks dangerous to the untrained eye, this is actually part of a shark conservation program in the Bahamas where humans are taught how to behave in the water with sharks. Humans are actually the biggest cause of shark attacks. There is no such thing as a dangerous shark, only dangerous situations that we create or misinterpret.