Xenia coral dying?

My Xenia has slumped over 2 days ago after staying total 3 days in the tank.

Its head has fell off from it ,the body has a split like someone cut them

what should I do? will it come back to life?

Tank info:
6 Gallon
Salinity : 1.025
LED 9x1 watts reef lighting beamworks
Light schedule 6-6PM (blue light 1 hour before turning off)