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Saltwater Aquarium/help identifiying this thing on my live rock moving around


have recently noticed a lot of stuff growing on my live rock
this latest is this sort of flat shell so to speak that has stripes on it the picture I attached it is located to the right of the chocolate chip startfish tentacle
it is the round thing with stripes

Hi Christopher:

It appears to be a micro mollusk; in my opinion it makes a nice welcome addition to your reef aquarium. They definitely add biodiversity to a well balanced reef aquarium ecosystem.

There are thousands of species of micro mollusks that span the tropical oceans around the globe, that come in on live rock, it's definitely not anything that will harm your aquarium.

I wish you the best of luck with all your reef aquarium endeavors.


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David Ocreef


Technical saltwater coral reef related aquarium questions are welcome. Coral, invertebrate, and peaceful species of saltwater fish questions are welcome. Questions asked on Saturday and Sunday will be answered the following Monday. REMINDER: Please check the answers pool to see if your question has already been asked and answered. Questions typically are answered within a 48 hour period, however sometimes it may take longer.


I possess over twenty-five years of hands-on experience and knowledge in the ecology of aquariums. Beyond the traditional, I have successfully tested and sustained environments that have been uncharted territories for hobbyists, for decades. I am the first to admit I don't know it all because there will always be something new, amazing, and exciting to learn about, as discoveries are made. It's a hobby one can never outgrow, or grow tired of.

MASNA - Marine Aquarium Society of North America. Director of Orange County Reef Aquatics -

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After High School, my experience and love of marine animals influenced me to take up studies in Marine Biology. Throughout college, I studied Microbiology with an emphasis on Marine Life, as well as numerous other sciences. I continued to advance in this hobby, by building a dozen or more saltwater ecosystems all utilizing Microbes as the major source of my filtration method.

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