Red detritus critter ID please

[Fg10405]

Please help identify this critter. I had reduced feeding and my Achilles tang suffered reinstated feeding amount and Achilles has recovered. Thanks

 

[jx.reef]

Spaghetti worm. Good cuc

 

[MaxTremors]

As mentioned, spaghetti worm. They are harmless, though they can build up little piles of detritus on your rock work (they basically fill a little crevice with detritus that they catch and kind of make a home of it), so if you seem them on your rockwork, blow them off periodically with a turkey blaster so that they don’t become nitrate factories.

 

[Fg10405]

Thanks for the input.

 

[Fg10405]

Thanks for the input

 

[Fg10405]

 

[Fg10405]

Please advise on what is next to the urchin. Thanks!

 

[encrustingacro]

Coralline algae

 

[Fg10405]

Thanks! Been so long since I’ve seen it, was worried