'The randy 'super' males are said to pack a penis two-and-a-half times the length of their entire body - the largest genital, relative to size, of any bug on Earth'.
http://www.mirror.co.uk/news/uk-news/billions-randy-super-fleas-giant-10979214.amp
http://www.mirror.co.uk/news/uk-news/billions-randy-super-fleas-giant-10979214.amp