A few years ago when I started with the hobby I may have started a  little too early with anemones. Ashamed to admit I killed a few for  really stupid reasons.
However, I eventually discovered this little guy who showed me he's tough as nails:
After only a short time in the tank he decided he liked it best up on  the glass right next to the power head.. which I knew was the worst  place for him to be but he was intent on staying.  He liked it there so  much he decided to split!
I gave the second nem to my friend who had also started a tank unaware as to what was coming..
Found the stupid thing after work with his face sucked into the power head
I was smart though and just let him pull himself out.  Miraculously he survived and healed himself fully!
However this was only the beginning!  After I bought a second clown fish  I decided I needed a new, bigger anemone for them to share, and I  purchased a Green LTA.  Well I suppose the RBTA didnt like him.. because  one night he completely disappeared.
I know if nems die they make an awful mess in the tank.. and I was  pretty sure nems cant eat nems.. so I had NO idea where this thing had  gone and assumed it was just hiding somewhere I couldnt see.
After about a month with still no sign of the poor guy I decided it was  time to do a filter clean.  After opening up my Fluval 405 I noticed the  tiniest little pink blob (about the size of a dime) right before the  impeller.
Thinking to myself.. could this possibly be my anemone.. I picked it up  and put it back in my tank and sure enough he started to open up!
Things were looking good at first but now its been about a month and hes still all closed up..  hoping for the best!