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THE CORRECT ANSWER: The giant clam

The giant clam (Tridacna gigas) holds the impressive title of the largest bivalve mollusc on the planet. Measuring over one meter twenty in length and weighing up to two hundred and fifty kilograms, this colossal creature inhabits the shallow coral reefs of the Indian and Pacific Oceans. Contrary to popular legends falsely describing it as a man-eater, the giant clover feeds primarily through a fascinating symbiotic relationship. Its fleshy coat, often tinged with vibrant colors ranging from blue to fluorescent green, is home to photosynthetic microalgae called zooxanthellae. In exchange for safe shelter and sunlight, these algae provide the mollusc with the majority of nutrients essential for its survival. Due to the degradation of its natural habitat and overfishing for its flesh or limestone shell, this spectacular species is now strictly protected around the world.