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Still Waters

Piranhas have new set of sharp teeth waiting

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Still Waters

You don't want to ever get too close to a piranha, but if you did, you'd notice something rather strange: these freshwater fish shed their old teeth in groups, one side of the mouth at a time, with new teeth growing in as replacements simultaneously.

A new study has found that an interlocked half mouth of new teeth wait in 'crypts' underneath the old teeth, allowing them to instantly take over once the previous teeth fall out.

The researchers who discovered this rather unusual odontological manoeuvering – which happens several times in a piranha's life – say it might have evolved from the piranha's main needs to guard against tooth loss, and always ready for feeding.

https://www.sciencealert.com/piranhas-are-able-to-simultaneously-swap-in-new-teeth-for-old

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Gwynbleidd
10 hours ago, Still Waters said:

these freshwater fish shed their old teeth in groups, one side of the mouth at a time, with new teeth growing in as replacements simultaneously.

Nature is so amazing. 

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