Female Cherry Barb Looks Distorted?

[Ny82]

Hi one of my female cherry barbs looks wrong. She is in a 95L with 4 other females and 2 males, 1 male and 2 female guppies, a platy and fry. Her belly is huge and she looks like she has a ridge on the left hand side. She is active and eats well.  I tried to get pics but they zip about so much. Here are the best I could do.
 

 

 
The other 4 females are fine. Any ideas?
Thanks.

 

[BerryAttack]

it could be that its pregnant, or a weird growth, but i would stop feeding for 4 days, then feed some peas, (could be constipated 0.o) and see if it goes away.

 

[Ny82]

I will give that a go. Thanks!