What the heck?

[JLee60]

I am told by another source that the fuzzy looking ball under the torch is a sponge and harmless. Is it? Should it be removed?

 

[Crabs McJones]

Yup, big sponge. Only remove it if it's effecting the coral. Otherwise it's a harmless filter feeder.

 

[JLee60]

Yup, big sponge. Only remove it if it's effecting the coral. Otherwise it's a harmless filter feeder.

Thank you sir!