Black sponge REEF2REEF Saltwater and Reef Aquarium Forum

I have this black sponge that hitchhiked onto my rock. Should I keep it?

Purple looking sponge (looks like cyano) is taking over my tank, Page 2

Encrusting black sponge REEF2REEF Saltwater and Reef Aquarium Forum

Is this a baby sponge? REEF2REEF Saltwater and Reef Aquarium Forum

Orange sponge looking slug? Never seen this before

Sponges of our Tank REEF2REEF Saltwater and Reef Aquarium Forum

Sponge Eating Fish REEF2REEF Saltwater and Reef Aquarium Forum

Yellow round sponge REEF2REEF Saltwater and Reef Aquarium Forum

Black sponge REEF2REEF Saltwater and Reef Aquarium Forum

Getting rid of encrusting sponge REEF2REEF Saltwater and Reef Aquarium Forum

What is this black looking sponge like stuff In my reef tank

Zoanthids. Black squishy/spongy stuff around heads

Sponge REEF2REEF Saltwater and Reef Aquarium Forum

What is this black hitchhikera sponge? REEF2REEF Saltwater and Reef Aquarium Forum

Black stuff of my live rocks—I want it to go away!

Opinions on this sponge growing in DT REEF2REEF Saltwater and Reef Aquarium Forum