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black calvus waving it's fins?


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hi everyone,

i have some black calvus and noticed that one of them is inside one of my breeding shells and is waving it's fins from time to time, it would wave for about a second then stop for a second and wave again, so on..

does this mean it has eggs? cause i know bristlenose wave their fins for flow but never knew that calvus do?

please let me know what you think.


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