What is this on my frog spawn coral?

[Arob21]

Just got this frogspawn yesterday and noticed these blue rings around some of the tentacles. Almost looks like circulation to them if getting cut off or something

 

[RockBox13]

I see what you’re talking about. My first thought was that it might have been stung by another coral in the recent past. The tissue doesn’t seem to be dying or affecting the coral overall. I would say to just keep an eye on it and give it an iodine dip if you do start to see any damage.