Id on these two unknown things

[seth16]

Noticed this white encrusting sludge as well as this soft textured growth right above, no idea what they could be need to know if they should be removed

 

[lou dog420]

Sponge maybe??

 

[melypr1985]

Might be a sponge... #reefsquad can you help out here?

 

[wattson]

like to know the brown algae slime on your rocks is