Missing Purple Tang

[Zoaelite]

I'm pretty baffled and really worried right now, one of my favorite fish my Purple tang has just gone missing. No Nitrate spike, no body, nothing . I found my cat on top of the fish tank the other day, anyone have an opinion if she could be the culprit? I've checked everywhere including the overflow and there is nothing, this had to be the most docile tang I owned (Which I hear is rare for purples) so I hope she shows up.
Levi