It likely got too close to that powerhead on the left of the pic. It has a chance to heal, just keep the power heads away from it
yeah it looks like it did get sucked into the power head. I just placed the anemone in a separate container. And now would I have to do water changes? Assuming that there might be a lot of toxin in the tank now? Hopefully it heals, I'm so sad it turned out like this.