The fish’s sagittal otolith, one of the small “stones” found in the ear of the fish, is “triangular shaped” with a “tadpole shaped impression,” according to the study. The gas bladder, or swim bladder ...

A tiny fossil, Acronichthys maccognoi, rewrites fish evolution in North America and reveals how otophysans conquered freshwater habitats.

(CNN) — US Customs and Border Protection officers in Arizona have seized 242 pounds of swim bladders – the organ that helps fish control their buoyancy – that came from the endangered Totoaba fish, ...

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 ...

A 70-million-year-old fossil fish from Alberta, Acronichthys maccognoi, is the oldest North American otophysan. Its discovery ...

The amazingly efficient lungs of birds and the swim bladders of fish have become the inspiration for a new filtering system to remove carbon dioxide from electric power station smokestacks before the ...

You walk past your fish tank and suddenly notice one of your fish floating strangely near the surface or maybe even upside down. Your heart skips a beat. Is it dead? But wait its gills are still ...

When saltwater fish long ago evolved to live in fresh water, many of them also evolved a more sophisticated hearing system, ...

A fisherman removes a swim bladder from a giant Nile Perch at Nambo beach in Bondo, Siaya County. [Isaiah Gwengi/ Standard] It’s 11am at Nambo beach in Bondo, Siaya County. Three fishing boats have ...