An curved arrow pointing right. 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 ...

Chinese crime networks and Mexican cartels are using Canadian ports to trade highly lucrative fish bladders for the precursor chemicals needed to produce fentanyl.

To clarify: not the meat of the fish itself, a beast nearly six feet long and weighing 220 pounds, from the croaker family, which doesn't have much culinary interest. It's the swim bladder ...

They can secrete gas into the swim bladder or remove it. A fish that lives on the bottom doesn't need to be able to maintain its buoyancy. Narrator: So, the Jell-O layer isn't a perfect substitute ...

Vaquitas were regularly drowning in gill nets meant for shrimp and totoabas, a fish whose swim bladder is a delicacy in China. In 1975, after the totoaba was declared endangered, Mexico outlawed ...