A new analysis of piranha teeth revealed that a new set of teeth wait in a 'crypt' below the current teeth so that the fish are never without a pair
Piranha teeth have the tough task of crunching bone and shredding flesh and, like well-used kitchen knives, they dull over time. Since they have no way to sharpen their teeth, piranhas lose and regrow all of the teeth on one side several times over their lifespan.
A new analysis of piranha teeth revealed that a new set of teeth wait in a"crypt" below the current teeth so that the fish are never without a pair. This way, they can happily keep munching on what the study refers to as an"anatomical potpourri of fish parts, ranging from scales and fin rays, chunks of flesh and whole fishes."The study published in the journal Evolution and Development.
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