What is the rarest coconut?

Could you enlighten me on the mystery surrounding the rarest coconut? I'm intrigued to know which variety stands out as the most elusive and sought-after among the plethora of coconuts found in nature. Is it a unique species that grows only in remote islands, or perhaps a rare mutation that has captured the imagination of botanists and food enthusiasts alike? I'm eager to learn more about this enigmatic coconut and its distinguishing characteristics that set it apart from the rest.