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 ...

Choi, a man in his 60s who operates a synthetic resin product factory in Ansan, Gyeonggi Province, said he receives sets of Yeonggwang dried yellow corvina during every holiday season. Known as a ...