Assertion: cuttlefish's cuttlebone | /r/HasProperty | problem
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Source sentences:
text: Forget that cuttlefish, not exactly accustomed to walls in their homes on the high seas, can sometimes slam into tank walls and fracture their cuttlebone, the thin structure of calcium carbonate that gives the creatures their buoyancy — a problem the aquarium solved, by the way, with tanks padded in plastic.