Is this black sea sponge?? REEF2REEF Saltwater and Reef Aquarium Forum

Sponge maybe? REEF2REEF Saltwater and Reef Aquarium Forum

Film with Black dots REEF2REEF Saltwater and Reef Aquarium Forum

Is this black sea sponge?? REEF2REEF Saltwater and Reef Aquarium Forum

Black algae? Or black sponge? REEF2REEF Saltwater and Reef Aquarium Forum

Black Sponge? REEF2REEF Saltwater and Reef Aquarium Forum

Encrusting black sponge REEF2REEF Saltwater and Reef Aquarium Forum

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

Is this black sea sponge?? REEF2REEF Saltwater and Reef Aquarium Forum

New Reefer Needs Help With Blue Haliclona sp. Sponge

What is this thing??? Help a noob. REEF2REEF Saltwater and Reef Aquarium Forum

Sponge turning brown, should I worry? REEF2REEF Saltwater and Reef Aquarium Forum

Nudibranch care REEF2REEF Saltwater and Reef Aquarium Forum