Platypus

When he received the first duck-billed platypus from Captain John Hunter in Australia, naturalist George Shaw thought it was a hoax. “Impossible not to entertain some doubts as to the genuine nature of the animal, and to surmise that there might have been practised some arts of deception in its structure,” he wrote in the journal Naturalist’s Miscellany.

Surgeon John Knox agreed: “Aware of the monstrous impostures which the artful Chinese had so frequently practised on European adventurers … the scientific felt inclined to class this rare production of nature with eastern mermaids and other works of art.”