this post was submitted on 24 Apr 2025
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[–] [email protected] 62 points 1 week ago (2 children)

Me: Is that true?

Search a little

Me: Oh my god...

[–] [email protected] 57 points 1 week ago* (last edited 1 week 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?

[–] [email protected] 35 points 1 week ago (2 children)

most of the sand is eroded inland and deposited by rivers

[–] [email protected] 12 points 1 week 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.

[–] [email protected] 12 points 1 week ago* (last edited 1 week ago)

Thank fuck for that!

[–] [email protected] 27 points 1 week ago

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

[–] [email protected] 4 points 1 week ago* (last edited 1 week ago)
[–] [email protected] 5 points 1 week ago

Ya know that sound that you can hear under the water at white sand beaches? Sound like sand being ground through a bearing? Or a neck joint pressurizing? Yeah, that's the parrot fish... happily eating away.