Fish maw — the swim bladder of a fish — is one of the most expensive dried-seafood products in the world. A Chinese delicacy, it can fetch $450 to $1,000 per kilogram. It’s often viewed as a symbol of ...

A rare fish, the Totoaba, faces extinction due to illegal fishing for its valuable swim bladder, called fish maw. This practice also endangers the Vaquita, a marine mammal. The black market for fish ...

Sarah Ddungu, a former public health official turned fisherwoman, says the trade in Nile perch swim bladders has given her family a good life in her retirement. Ddungu operates four boats on Lake ...

An hourlong flight east of Hong Kong in the Chinese port city of Shantou, traders cater to affluent businessmen quietly looking to drop up to $30,000 dollars on a single fish bladder. While these ...