This happen to me just the other day. LTA on the move did'nt even think it would get sucked in as he is pretty large. Sucked into large powerhead. Took the strainer off the pump with the Anenome sucked through it. Let them both rest in the tank with that pump off the rest of the day. I think I got lucky, he is looking fine.

I went to work & when I got home he had pulled himself back through the strainer. Did not look to be very damaged just a little deformed. Has filled himself up, Extending fine & starting to seat himself.

Good luck