THAT WAS A GOOD EXAMPLE OF TRYING TO TELL THE DIFFRENT FROM MALE AN FEMALE I WAS VERY IMPRESS, I HAVE 7 UMBEE'S SIZE 3" TO 5" AN I HAVE BEEN WATCHING THEM EVERY DAY FOR THE LAST 5 MONTHS TRYING TO DETERMINE IF I HAVE JUST 1 MALE, WHEN I BOUGHT THEM THEY ALL WERE THE SAME SIZE BUT 1 JUST GREW BIGGER THEN ALL THE REST, BUT I NEED TO NO THE SAME QUESTION THE LINE ON SIDE OF THERE BODY DO THAT REALLY MEANS MALE OR FEMALE BECAUSE MY BIG 1 LINE NEVER FADES AN THEIRS JUST 1 MORE SMALL 1 WITH THE SAME LINE THAT FADES AN COME BACK BUT THE OTHER 5 NEVER SHOW A LINE AT ALL.