Mussel??

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lbannie

Aquarium Advice FINatic
Joined
Jan 30, 2010
Messages
501
Location
Upstate NY
Is this a mussel? I just downsized my tank and found these guys all in different places with sand around the base of them. Are they beneficial? Not sure where they came from! I put them together so I can watch them
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Cool thanks! How about these? Sponge? They were on bottoms of rocks, but with the move some are facing up. What causes these? Harmful? Thanks!!
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Oh sorry! The yellow sponge is what I was wondering about. What makes that appear? Is it beneficial?
 
Oh sorry! The yellow sponge is what I was wondering about. What makes that appear? Is it beneficial?


Just common sponges, they pop up in most tanks. They're filter feeders, no real effect on your tank.
 
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