Black sponge REEF2REEF Saltwater and Reef Aquarium Forum

I've been told this is black sponge. Do I remove it? Will it spread?

Sponge ID? REEF2REEF Saltwater and Reef Aquarium Forum

What is this black hitchhikera sponge?

Black sponge? REEF2REEF Saltwater and Reef Aquarium Forum

Black Sponge? REEF2REEF Saltwater and Reef Aquarium Forum

Is this sponge good or bad?? REEF2REEF Saltwater and Reef

Yellow sponge REEF2REEF Saltwater and Reef Aquarium Forum

Zoanthids. Black squishy/spongy stuff around heads

Black sponge REEF2REEF Saltwater and Reef Aquarium Forum

Sponge Eating Fish REEF2REEF Saltwater and Reef Aquarium Forum

Sponge on hammer? REEF2REEF Saltwater and Reef Aquarium Forum