We normally only pay attention to fish stories when they're the subject of really bad science fiction movies (and even then only if there's boobs and booze involved). This is interesting, however, and we're all about anything that keeps our boys and girls in one piece while they're laying hate down on the enemies of our country.
"A huge fish that is impervious to piranha attacks could become the inspiration for a new class of ultratough composite materials.
Its scales are so tough that piranha teeth crack when they chomp down onto them. Each scale is coated with a rock-hard mineral material, but they have soft cores made from strings of stretchy protein. The fish is called the arapaima, and it's native to Brazil..."
Read the original story here, 'cuz we think it's cool but we're too fucking lazy to copy and paste the whole thing.