Please Help Identify

[fg_aquariums]

Hi everyone,

can someone please tell me what this stuff is growing in my tank. It’s only in back area of the rock work.

 

[brmreefer]

Appears to be a type of sponge.

 

[Goaway]

(Leucosolenia nautilia) White Spaghetti sponge.​

 

[fg_aquariums]

(Leucosolenia nautilia) White Spaghetti sponge.​

Thanks. Should I be worried about this stuff? It’s nowhere visible in the front of the tank. I just happen to be cleaning the back right now.