Piranhas are among the deadliest creatures in the water, with razor-sharp teeth that can cut meat easily, but a fish in the Amazon basin has developed a "bullet-proof vest" to protect against the unpleasant bite of piranhas.  Researchers have extensively described the armor of freshwater fish, known as Arapaima gigas . The fish has a tough, though flexible, inner layer that is bound by collagen to mineralize the outer layer of the scales. In addition A. Gigas can weigh more than 300 pounds (150 kilograms) and reach a length of over 10 feet.
"Similarly, bullet-proof vests consist of several layers of flexible webbing sandwiched between layers of hard plastic," it says in a statement describing the results. "But artificial materials are bound with a third bonding material while the fish scales are bound at the atomic level, they grow together and interweave into a solid piece."
PIRANHA TEETH STUN RESEARCHERS AFTER AMAZING DISCOVERY
"A window may look strong and solid, but it does not give in. If something attempts to pierce it, the glass would break," one of the colleagues said Study authors, Robert Ritchie, in the statement. "When nature binds a hard material to a soft material, it rates it and prevents this fragmentation effect, in which case the binding structure is mineralized collagen."
armor because of the similar scale overlapping system. However, natural armor such as these fish scales is tough and much lighter, without compromising flexibility and locomotion, "study lead author Wen Yang said in an interview with Reuters.
The researchers said that the tenacity of the "surface layer of fish" [s] shows that they are one of nature's toughest flexible biological materials, "the study concludes.
"Remember that the fish scales have been developed over hundreds of millions of years," Yang continued. They are very advanced.
The research was published in the journal Matter and supported by the US Air Force Office of Scientific Research.
A separate study published in August looked at how piranhas, which are omnivores, can regenerate rows of teeth at the same time. 19659003] CLICK HERE TO OBTAIN THE FOX NEWS APP