Black looking thing growing on rock

[alyrchd]

Any idea what this might be? Should i worry?

 

[fishguy242]

hi,welcome to the reef...
does it move ?
black sponge ?

 

[alyrchd]

hi,welcome to the reef...
does it move ?
black sponge ?

Hi, thank you!!
i’ve been observing it and didn’t notice any movements.
If it’s a black sponge, should i keep it or try to get rid of it?

 

[fishguy242]

some say get rid of it ,outside of tank ,will release toxins if done in tank.
i like it and leave it alone,never seen it hurt anything myself...

 

[alyrchd]

some say get rid of it ,outside of tank ,will release toxins if done in tank.
i like it and leave it alone,never seen it hurt anything myself...

thanks! i think i’ll keep it

 

[MamaMolo]

I have them in my tank and haven't noticed it hurts anything either.