Well, if it was a sponge, why it was emanating a fluid after puntured by a crab? The crbas love it, this ball had crabs around it. I had to separate crabs to make the pictures.
This this disappear already, a sponge would be still there.
It just appeared in the aquarium, I didnīt notice that thing growing, a spronge grows slowly and this thing had about 1/2 inch in diameter.!!
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