Banggai Cardinal Blisters Behind Pectoral Fin

[EricR]

My Banggai cardinal has developed something behind (at the base of) his right pectoral fin.
My best description is something like 3 filled blisters, partially attached to each other.
First noticed about 1 week ago. (Have had the fish 1 year 2 years)
*this fish is the aggressor towards my pajama cardinal — it’s never a confrontation,,, more like the Banggai chases the PJ and the PJ never fights back

No new fish added this year.
If aggression from another fish is the question, 3.5+ year old solo clown would be the suspect but I’ve never seen any clown aggression towards the Banggai.

These pictures and video are from iPhone and don’t capture the issue perfectly but best I could do:
*tried multiple times this weekend under full WHITE light with DSLR but fish never cooperated,,, sorry

End of video has Banggai turning away to give glimpse of protrusion (maybe):

 

[MnFish1]

Thanks for the excellent pictures. It could be the result of injury - or it could be an internal problem - I can't tell from the video - do you see that it looks like an actual blister (i.e. clear or nearly clear from the side or is it actual tissue swelling. I would doubt a parasite issue - since you've had the fish for a year - and other fish aren't showing symptoms - have you added anything lately - has the stock been normal? These fish do not live long lives - and this may be an internal issue which may be a tumor, virus related - which may not be treatable. I suppose you could add the fish to a tank with an antibiotic (broad spectrum) - and see if there is any improvement

 

[EricR]

Thanks...
Tissue swelling seems likely. (I just said blister for lack of a better description).
I added some snails about 2 months ago but I put them through 50+ days of QT first.
(No fish or corals added this year)

For now, I'm just monitoring. If it gets worse, I'll probably do something.
Fish seems fine otherwise and no other fish showing any symptoms of anything (that I can tell).

 

[Sdoutreefer]

I'm not a vet, but it looks like it could be due to an injury, as stated above.

Was the fish quarantined previous to purchase? And/or after purchase?

 

[EricR]

I'm not a vet, but it looks like it could be due to an injury, as stated above.

Was the fish quarantined previous to purchase? And/or after purchase?

Fish was added 10/2022 ... oh,,, I guess it's been 2 years, not 1,,, oops.
I do HTTM (Hybrid Tank Transfer Method), which I know is not popular here, but that's what I do and did for this fish.

 

[Sdoutreefer]

Fish was added 10/2022 ... oh,,, I guess it's been 2 years, not 1,,, oops.
I do HTTM (Hybrid Tank Transfer Method), which I know is not popular here, but that's what I do and did for this fish.

Are there any other fish showing signs of sickness?

 

[EricR]

Are there any other fish showing signs of sickness?

Nope -- only 4 fish and the other 3 look perfectly normal.
*newest of the 4 fish is from 11/2022,,, so it's been a while

 

[Jay Hemdal]

My Banggai cardinal has developed something behind (at the base of) his right pectoral fin.
My best description is something like 3 filled blisters, partially attached to each other.
First noticed about 1 week ago. (Have had the fish 1 year 2 years)
*this fish is the aggressor towards my pajama cardinal — it’s never a confrontation,,, more like the Banggai chases the PJ and the PJ never fights back

No new fish added this year.
If aggression from another fish is the question, 3.5+ year old solo clown would be the suspect but I’ve never seen any clown aggression towards the Banggai.

These pictures and video are from iPhone and don’t capture the issue perfectly but best I could do:
*tried multiple times this weekend under full WHITE light with DSLR but fish never cooperated,,, sorry

End of video has Banggai turning away to give glimpse of protrusion (maybe):

Could be a tumor - you might have missed its growth at first.

 

[EricR]

Could be a tumor - you might have missed its growth at first.

Thanks.
If that's the case, not really anything I could/should do about it, correct?

 

[Jay Hemdal]

Thanks.
If that's the case, not really anything I could/should do about it, correct?

Not if it’s a tumor, but fish can live with these for some time.