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![Peter87214766 Avatar](https://lunarcrush.com/gi/w:24/cr:twitter::1006210459836518401.png) Peter [@Peter87214766](/creator/twitter/Peter87214766) on x XX followers
Created: 2025-07-25 00:08:32 UTC

cuttlebone is not actually bone but its internal shell, which is about XX% calcium carbonate. After cuttlefish die, the cuttlebone is used to supply calcium for pet birds. They also have X hearts: X pump blood to the gills & one circulates it to the rest of their body. Their


XX engagements

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**Related Topics**
[shell](/topic/shell)

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