White bubbles on Duncan stem

[R33f_Hacker]

Hello,

I found these white bubbles on my Duncans this morning and have never seen this before. Does anyone know what this might be? Thanks

 

[fishguy242]

hi,tissue looks great,not sure about bubbles? how is now..? sorry took so long .. :)

 

[R33f_Hacker]

Hi, they are doing ok. still not fully opening up since I transferred them to a new tank end of Feb. A marine biologist told me the bubbles can be from some type of sensitivity to UV light??? I didn't get much of a explanation but said it was no big deal.