Pic-O-Puffer

Picture of two of the 5 puffers. One is checking out an already emptied out snail shell. They move a lot and turn on a dime so lots of the images were blurry. Cute little suckers :) Happily take blood worms and snails and pretty much leave each other alone except the occasional tug-of-war-this-is-mine battle for the long worms. I KNOW I have one male and one female but I can't tell with the rest. Thinking another two are female cuz of body shape but I'm trying to look for the eye wrinkles, lines behind he eyes. That's how you tell if it's a male. I think the one in the pic looking at the shell is male (the highlighted line behind the eye) and the one in the back is female.