what the heck is this?

[FriedReef TV]

My tank is relatively new and I just saw this white slime/goo stuff in the corner under some rocks

 

[sfin52]

sponges will come and go.

 

[Bryce M.]

Sponge

 

[DSC reef]

That looks bacterial to me, especially if the tank is new. Possibly decaying food, etc? Can't see the pic very well on my phone though.

 

[reef lover]

I agree dead gunk....did you use a shrimp to cycle?