Sponges

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  Orange Sponge

  This orange sponge was added to the tank in March 1999 and has shown little growth since then. Note that touching sponges with bare hands can cause tissue damage - areas where the hand touched it have died back a little. Sponges are filter feeders that help with water quality in the aquarium.

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  White Ball Sponge

  This is an unidentified white ball sponge common to most reef tanks. This one is growing in the refugium area of the sump. Sponges are filter feeders that help with water clarity in the aquarium.

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  Yellow Ball Sponge

  This yellow sponge was added to the tank in March 1999 and showed noticeable growth. Sponges are filter feeders that help with water clarity. Some internal structures appeared to turn black over time, which can be normal aging in sponges.