Serious question about Crab that may be eating SPS

ohk so recently i got a piece of SPS called a green slimmer. its been in there for about 3 days now and yesterday i noticed a little crab on him. well last night and today i also noticed the coral started to look as if it were dying.

is the crab doing this? or is it just not making it ?

pic of
When i first got it
Image of green slimer - Photobucket - Video and Image Hosting

pics of it now.....(they were taking with a better camera too)


ohk well i can seem to get the new pics up i will ASAP

 

LOL its a acropora crab he is doing his job in that he will hunker down in the branches and pic off food and particles to keep the coral clean and they will ward off parrot and triggers and other coral munching fish .. They will run out and pinch fingers also that mess with their corals

Oh I could only see one picture of any green acro .

 

fewwwww thats aload of my chest well anyway then do u think the coral is dying? its turning whiteish ( ill get pics up soon )

if it is indeed dying should i start to frag what i have left???

 

its bleaching

 

It's not uncommon for sps corals to bleach or brown out when you first introduce them to a tank. As long as the flesh remains on the coral, it should color back up within a few months depending on your light system and your water quality.