Brown hairy stuff from coral

[Dinkins Aquatic Gardens Verified Sponsor]

Any thoughts on what the brown stuff is?

 

[ying yang]

Coral poop

 

[Pistondog]

2nd what @ying yang said.
I see it with lighting changes.

 

[piranhaman00]

Poop

 

[Sharkbait19]

Probably just poop

 

[Dinkins Aquatic Gardens Verified Sponsor]

He's closed up for the night, so I turned the lights up real quick to snap a pic. Kind of concerned about all the brown tips on the "spines" of his skeleton?