Why is my guppy hump？

　　Why is my guppy hump？Personally, I like colorful. I recently bought 4 pairs. When I bought it, I didnt find it. I only saw a guppy in the past two days.?
Let everyone see the picture
Tuocheng like this, his belly is not protruding
This is also
This is a normal fish obtained with it
normal
Whats wrong with this? Is it something wrong when I brought it back?
======== Xianglong Aquatic Alliance Fish Friends Comment =====
I am Xueba Comment: Help others solve problems
Once in a Thousand Years Comment: Malformed
Luohe Comments: This looks a bit strange
Mosquito repellent comment: I see no problem
Heated sex ghost Comment: The belly retracted to look like a female fish just after the small fish
Healing burned pork dumplings Comments: This is the rhythm deceived by fishmongers, your fish is probably deformedDimensional War Red Dragon Companion Manke Official Website)How to distinguish true and false for Qianhu Arowana feed$Arowana eat bread bug^How about Qianhu g1 feed#Dimensional War Red Dragon Comics free pop-up window.Arowana keep feeding$Dimensional War Red Dragon free drop-down(How long can arowana be hungry to eat feed% St.Pierre and Miquelon Fish，