this post was submitted on 24 Apr 2025
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[–] tetris11@lemmy.ml 57 points 1 month ago* (last edited 1 month ago) (3 children)

https://ocean.si.edu/ocean-life/fish/tough-teeth-and-parrotfish-poop

In a year, one large parrotfish can produce 1,000 pounds (450 kg) of sand, the weight of a baby grand piano.

Most of the sand comes from waves sloshing onto rocks though, right? right?

[–] PotatoesFall@discuss.tchncs.de 35 points 1 month ago (2 children)

most of the sand is eroded inland and deposited by rivers

[–] shalafi@lemmy.world 12 points 1 month ago

Depends entirely on where you're at. Our coastal beaches are pure white and sound like popcorn (fish eating) when you're underwater near coral.

The beaches along the rivers can be brown sand, washed down as you say, but some are pebbles instead. Never understood how two rivers so close together ended up with such different beaches.

[–] tetris11@lemmy.ml 12 points 1 month ago* (last edited 1 month ago)

Thank fuck for that!

[–] FooBarrington@lemmy.world 27 points 1 month ago

I had never thought about the reproductive cycles of grand pianos, fascinating

[–] ch00f@lemmy.world 4 points 1 month ago* (last edited 1 month ago)