When you swim through the azure waters of the Great Barrier Reef, there is one creature on the seafloor that's almost impossible to miss: the giant clam. Its huge, fluted shell frames a soft mantle shimmering with electric blue, green and gold.

Source: [Phys.org](https://phys.org/news/2026-09-giant-clam-monthbymonth-diary-great.html)

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