and not really i meant like this http://forum.aquamojo.com/uploads/1223079560/med_gallery_2505_78_252506.jpg
i wouldnt really consider that a nuchal hump just a "forehead" lol but thats what i meant by how males have different build but then again yours is still small so that could be something that comes with age and i had forgotten about the black in dorsal being an indicator for female with these guys