Zoa tentacles stretch out?

[mushy coral]

I got this frag of krakatoa zoa for few months ago. It was nice plum and round with short and fat tentacles around the rim. Now the tentacles turn thin and long. This does not happen to any of my other zoas, only krakatoa. And also the polyps are moving away from others. Anyone know the problem here? Thanks in advance!
The pictures are when i first got them and now

 

[p1u5h13r4m24]

Typically zoas will stretch when they are looking for more light. Could be the issue, but I’m not a zoa guy :p

 

[mushy coral]

Typically zoas will stretch when they are looking for more light. Could be the issue, but I’m not a zoa guy :p

I have zoas that stretch their stem longer up to get more light but never seen any that thin its tentacles like this one