from the pix on the 1st page, i'd say it is a male, but the pic on the 2nd page lead me to think it's a female. anyways, yea, one big difference in male and female in early julvi stage is the black marking on the front 3/4 of the female's dorsal fin. o, about ordering from jeff rapps, i think it's aiite for u to do that, cuz i heard the 5"-6" that jeff have are actually barely pushing 5", including tail that is. so ur 4" is just rite