Angelfish with lump on stomach

[SarahMarie]

Hi everyone,

I've just noticed a lump on my Angel's stomach. We've had her for around 5 years now and shes never had any problems before. Shes in a 350l tank which is fully cycled. Also have done a 40% water change today and cleaned filter sponges (in tank water) just last week. No new fish have been added to the tank in the last 6 months, and she is the only angel we have in the tank. I've attached a picture above.

Does anyone have any ideas what could be wrong with her?

Thanks in advance! x

 

[DwarfCichlidLvr]

Beautiful angel there!
I really have no idea. I've never seen anything like that before.
@angelcraze may be able to help.

 

[JuiceBox52]

@Colin_T may be able to help as well

 

[angelcraze]

Sorry for late reply, how is your beautiful angel doing?

Did the swelling go down?

I have seen prolapse before, but not sure this is it. It looks related to the vent to me.