They are modified swim bladders, which most fish use for buoyancy while swimming. Lungfish use theirs to absorb and conserve oxygen from air. Modern lungfish, which are found in rivers and swamps ...

The earliest ancestors of lungfish emerged around 420 million years ago, when the fish’s swim bladders, air-filled organs that enable fish to regulate their buoyancy in water, evolved into a ...

Because their usual habitats are extremely low in oxygen, bettas have evolved to breathe air at the water ... dropsy, and swim bladder disease. While Betta fish can tolerate dirty water for ...

In research published in Advanced Science, investigators developed an injectable hydrogel containing components of fish swim bladders and used it to repair damaged heart tissue.

Hydrogels, which are soft materials formed by crosslinking polymers, could have a variety of medical applications.

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 ...

Scientists have developed a new injectable hydrogel, made from materials found in fish swim bladders, that could help repair ...

Hydrogels, which are soft materials formed by cross-linking polymers, could have a variety of medical applications. In ...