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Fresh water sponge
Observed: 6th August 2010 By: marymb1
Added: 17th May 2011
The one in the photo is about 5" approx. They grew abundantly in my large healthy pond over last summer. I had never seen them in previous years. One photograph shows one growing on wool that I had been using as a 'spawning mop' for goldfish. Other picture shows them extending across an old fish box that I had collected from the beach.They ended up about 8" across, always adhering to inanimate objects.