White spot on tail of Copper Band Butterfly?

Onewolf

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I got this fish from LFS 6 days ago. He is eating very well and behaving 'normal'. The spot on the back of his tail fin appeared 2 days ago. There are 5 other fish in the tank and none appear to have any issues.

Any ideas what this spot is? Should I quarantine the fish? Catching him will not be easy.

20210806_144244.jpg
 
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Jay Hemdal

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That spot is sharp-edged, on the trailing edge of the fin - I would say it is 100% Lymphocystis, a viral disease common in CBB. It may produce additional spots, but will generally go away on its own after 4 to 6 weeks as the fish is able to overcome the viral load.

The nape of the fish looks a bit thin. Good that it is eating, but feed it multiple times a day and try to bulk it up a bit.

What about that largish discolored patch on the lower part of the fish, between the two mid-body bars? Is that just from the photo, or do you see it in real life?

Jay
 
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Onewolf

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That spot is sharp-edged, on the trailing edge of the fin - I would say it is 100% Lymphocystis, a viral disease common in CBB. It may produce additional spots, but will generally go away on its own after 4 to 6 weeks as the fish is able to overcome the viral load.

The nape of the fish looks a bit thin. Good that it is eating, but feed it multiple times a day and try to bulk it up a bit.

What about that largish discolored patch on the lower part of the fish, between the two mid-body bars? Is that just from the photo, or do you see it in real life?

Jay

Thanks for the quick response and information. The 'discolored patch' is just an artifact of the photo lighting. There is no discolored patch there.

At the store he ate Mysis great however it took about 48 hours after he was brought home before he started eating and now it's a race between him and Midas Blenny to see who can eat the most Mysis. I am feeding the tank 3-4 small portions of different food per day. The CBB has also started pounding on the small Masstick blobs I stick to glass.
 
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Onewolf

Onewolf

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If nothing else this little mini crisis pushed me to get a QT tank setup/running. I have a 20H I've used as a temp tank when moving tanks in the past, but now it will be my dedicated SW QT tank.

I've had aquariums/fish for 5 years and this is the first time I've had a 'health' issue....
 

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Gtinnel

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If nothing else this little mini crisis pushed me to get a QT tank setup/running. I have a 20H I've used as a temp tank when moving tanks in the past, but now it will be my dedicated SW QT tank.

I've had aquariums/fish for 5 years and this is the first time I've had a 'health' issue....
It's good to have a qt/hospital tank setup but a fish having lympho isn't much of a health issue. It was more of a health scare LOL
 

Tamberav

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Don't move a copperband for lympho. There is no treatment except good water quality, low stress, and quality food.

The fish is thin, feed it often... LRS, live worms, and fresh clams from a market would be perfect.
 

Jay Hemdal

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If nothing else this little mini crisis pushed me to get a QT tank setup/running. I have a 20H I've used as a temp tank when moving tanks in the past, but now it will be my dedicated SW QT tank.

I've had aquariums/fish for 5 years and this is the first time I've had a 'health' issue....
Sorry, you don’t need to move the CBB for lymphocystis - save this tank for the next crisis!
Jay
 
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