Lump on rasbora!

[Cromid]

Hey guys, quick emergency ask - came home from work to find one of my harlequin rasbora to have a very large lump on its side.
Not sure if this is a tumour or what but it’s very very prominent

Hopefully you can see in the photos I’ve attached - did the best I could getting a good photo.

Any ideas what this could be and best course of action to treat?

 

[Cromid]

These might be abit better to see

 

[Rocky998]

Huh, that is very weird... Its like something is actually inside of it... Could be a bacterial infection but I can not diagnose this. What is the tank size? How long has the tank been set up? What is the water parameters? The more info we have, the more likely we can solve it

 

[Cromid]

Huh, that is very weird... Its like something is actually inside of it... Could be a bacterial infection but I can not diagnose this. What is the tank size? How long has the tank been set up? What is the water parameters? The more info we have, the more likely we can solve it

Yeah I can’t find anything online that even looks closely similar. He’s swimming about perfectly fine and eating too, doesn’t look to be acting any different to normal. The tank has been set up almost a year now, but the fish are over 2years old, and the tanks about 60L. There’s 8 harlequins and a random Lambchop that came with them by mistake, aswell as a Betta and some cherry shrimp. Water parameters I haven’t checked yet actually but will when I get home but temp is set at around 76, water is soft and slightly acidic too.

 

[Rocky998]

Yeah I can’t find anything online that even looks closely similar. He’s swimming about perfectly fine and eating too, doesn’t look to be acting any different to normal. The tank has been set up almost a year now, but the fish are over 2years old, and the tanks about 60L. There’s 8 harlequins and a random Lambchop that came with them by mistake, aswell as a Betta and some cherry shrimp. Water parameters I haven’t checked yet actually but will when I get home but temp is set at around 76, water is soft and slightly acidic too.

Ok. I hope you are able to get some answers on this. There are a lot of members on here who know way more than me. Just make sure to test your ammonia and nitrite levels