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I was watching a program about Barracuda - they have a front tooth that is supposed to be razor sharp. My kitchen knife goes blunt if I use it for long periods without sharpening. Sharks keep on growing new teeth but barracuda don't.

How do fish like Barracuda maintain a tooth that is razor sharp?

Edit News article on how sharp the tooth is

http://www.dailymail.co.uk/news/article-1348152/Barracuda-attack-breaks-womans-ribs-forces-boyfriend-seal-punctured-lung-hand.html

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    $\begingroup$ Added wiki link to your post. Adding links to content improves readability for curious and/or competent users, experts and those reviewing your posts. $\endgroup$
    – Tyto alba
    Jun 15, 2017 at 11:56

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Fish replace their teeth over time as needed. Thus, they don't maintain the sharpness of individual tooth, they just replace it. This is a passive process not a conscious process.

Source: Barton, M., & Bond, C. E. (2007). Bond's biology of fishes. Thomson.Pg. 414-415.

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  • $\begingroup$ @cup feel free to accept the answer $\endgroup$ Jan 12, 2019 at 0:18

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