How a squishy clam conquers a rock

It turns out that this mollusk’s boring organ is anything but

a giant clam

JUST THE FRILLS  Showy blue and green frills are the only visible parts of a kind of giant clam that traps itself for life inside the rocky mass of a reef by a process that’s been misunderstood for decades.

Nhobgood/Wikimedia Commons (CC BY-SA 3.0)

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