A man accused of being the biggest manta ray dealer since Indonesia established itself as the world's largest sanctuary for the fish earlier this year has been detained.

The man was arrested by members of the Wildlife Conservation Society together with the Ministry of Marine affairs and Fisheries

The gills of the mantas are sold to China to treat skin rashes, and even diseases like cancer, even though there is no scientific basis for their use.

Manta rays are threatened with extinction due to their low reproductive rates and because they are increasingly being hunted for their gills, the Convention on International Trade in Endangered Species says.

Al Jazeera's Step Vaessen reports from Bali.

Source: Al Jazeera