Most anemones can and will eat a fish if it strolls too close. I spoke with a local reefer about his carpet anemone, and he said he had to set it up in a seperate tank, because it ate a few of his prized fish in his tank, but he didn't want to get rid of it. He flat out told me that a carpet anemone (and presumably any anemone) will eat any and all fish that ever get close enough, until there are no fish left.
Sad but true fact. Even if it doesn't eat them, it can still sting and wound/kill them unfortunatly. I'm sorry to hear about your fish
I hope it gets better
