White Bump on Tang Dorsal Fin

[Rhombus]

Hi,
I'm hoping you can help me out. I ordered a Squaretail Bristletooth Tang through my LFS. I got the call that it arrived and when I went to pick it up I saw a small white bump on the top of it's dorsal fin. I'm hoping it's nothing, but I decided to leave it at the store for a few days. Does anyone have an idea what this is?
Thanks

 

[Big G]

Is the bump cottony or fibrous looking in texture? If so it's probably Lymphocystis. Usually presents on the fin edges, but not always.

 

[Rhombus]

it looked like a little extended flap part of the fin from what I could see. it was hard to see if it had a fiber texture to it as it didn't extend to far out.

 

[Big G]

Here's some info on Lympho with pics. so you can compare to your fish.

Lymphocystis

Lymphocystis What You Need To Know: * This is a virus that many fish carry for life. The white nodules (cauliflower-like growths) can grow both externally and internally; so symptoms are not always visible. * There is no known cure for Lympho. However, feeding vitamin-enriched foods and...

www.reef2reef.com

 

[Rhombus]

Thanks! That looks like it could be it. I'll hold off bringing him home to be safe.