The mantis khani bug is a flying insect that inhabited Gilligan's Island. after the Professor resaerched the bug in one of his books, "The World of Insects", the castaways thought that the mantis khani's bite was fatal within twenty-four hours after being bitten. But it seems that the Professor misread, and actually it was the bug itself that died twenty-four hours after biting something else. the classic symptoms of being bitten by the mantis khani are aches and pain in the joints, complete loss of appetite, and a severe case of itching.