Can you determine the sex of my puffers?

[Gwlson7]

Everything website I’ve read is a little misleading, some say females have more vibrant spots, while others say males do. I figured I’ll just post a photo of my three, let’s call them 1, 2, and 3 from left to right. 2 is definitely rounder, with more yellow. All three have some variation of eye wrinkles, but 2’s are less defined. 3 has spots sometimes, and other days is mostly grey. They all seem to have a line down the bottom of their belly, but it’s hard to tell since they swim so fast.

 

[DoraCory]

Tbh that photo isn't clear enough to tell.
But if they all have eye wrinkles and lines down their bellies then they're all male.