Paleontologist discovers rare soft tissue in fossil of crab

Most animals and plants never fossilize. For those that do, it's usually only hard parts such as bones and shells that preserve. However, in some exceptional cases, soft tissues such as muscles and gills survive the fossilization ...

ISA virus spreads via red blood cells in blood vessels

New research shows how the interaction between Atlantic salmon and the ISA virus leads to the development and spreading of the influenza-like disease ISA in fish. The new findings may be of interest to research on influenza ...

Study traces the evolution of gill covers

The emergence of jaws in primitive fish allowed vertebrates to become top predators. What is less appreciated is another evolutionary innovation that may have been just as important for the success of early vertebrates: the ...

Invasive 'supervillain' crab can eat through its gills

Invasive green shore crabs can "eat" by absorbing nutrients across its gills—the first demonstration of this ability in crustaceans—scientists from the University of Alberta have found.

New research rewrites the evolutionary story of gills

Gills are best known for helping most fish species breathe underwater. But less well known is the fact gills regulate the salt and pH balance of fishes' blood, a vital role played by the kidneys in other animals. Collectively ...

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