The international trade in exotic animal parts includes rhino horn, seahorses and bear gallbladders. But perhaps none is as strange as the swim bladder from a giant Mexican fish called the totoaba.

The oceans contain numerous hidden treasures, yet few are as rare, fragile, and valuable as the Totoaba fish. Often called “marine cocaine” because of its exceptionally high market price, this ...

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 kilogram.

Hydrogels, which are soft materials formed by crosslinking polymers, could have a variety of medical applications. In research published in Advanced Science, investigators developed an injectable ...