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Tridacna is an amazing bivalve mollusk long-liver, whose age can reach 300 years. Its shell is huge – up to one and a half meter in length, which is not surprising, as the clams themselves are not too small either. The weight of some species can be over 300 kilograms!
The shell valves are always open revealing the bright mantle of the mollusk, which is often blue, turquoise, brown, yellow or green in color. Yet, the shell itself looks quite plain, plastered with small shells and seaweed.
The clam passes seawater through itself and filters it, since it feeds on small mineral particles and unicellular organisms.
The residents of Australia and Oceania use tridacna for food and carve some simple household items from its shells.
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A unique living eco-system - colourful fish, beautiful corals and thousands of large and small islands – all these things make up the Great Barrier Reef.15