ID this coral please

[phatphong]

Hi this came with the live rock and I have no clue what it is. Can somebody ID this for me? Thankx
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[rolo65]

does it have polyps?.....looks like encrusting monti......or a ginormous green sponge

 

[phatphong]

No, it doesn't have any polyps.

 

[rolo65]

then i would think it was some type of sponge....but not positive