Nice size , yes for sure they will eat small fish or even large fish if they get too close .
I lost a 6” foxface , naso tang , and many sand sifting gobies
Once you notice them on them, it’s too late .
that being said that anemone is cheap , but bleached .....
A sure sign it hasn’t had proper conditions whether it was inadequate lighting , unstable parameters
It can take awhile to get colour back !
My honest opinion ...
if you haven’t owned them or cared for them Shop around for a healthy specimen with colour .
A simple google search will show you what colour they are supposed to be