Anemone trouble

[Andrew v.s wild]

I guess he was angry i removed like yall said and he's re-opened
Hey im new to this reef keeping thing and have a Bio Cube 8.
Its been set up for a while i 'd say 4 1/2 months.
Yesterday I purchased a Bubble tip anemone. And it was doing great until
my hermitcrab started picking on him stealing the food and pinching him.
I took the crab out but now my BTA is just curled up with his mouth open.
Is he dying how can i reverse this?
PLEASE HELP!!!
P.S. My Lighting Nitrates and Ph etc. are all great.