Why my guppy is always puffed up like this?

[professorjimjam]

Dears,
I don’t know why this guppy has a belly like this , please see image. Is it a disease or pregnancy? If pregnancy then why they don’t come out? The fish eats and swims well. But I am scared if it would explode as the belly gets bigger every month.

Can you please share your experience and tell if you know what is it

 

[fish101]

it might be that she is pregnant or being overfed

 

[M075]

Could try dropping or raising temperature 1 or 2 degrees Celsius, it triggered mine to give birth once when it was as big as this

 

[professorjimjam]

Could try dropping or raising temperature 1 or 2 degrees Celsius, it triggered mine to give birth once when it was as big as this

I did try that and did not help. It seems to me that the inside is just air as her skin is transparent and I cannot see anything inside. Here is another closer shot photo

 

[M075]

What temperature do you keep them at? I think they do best at around 25 celsius

 

[professorjimjam]

The temp is exactly 25C