this is about 2 inches long and about 1 1/4 inch in diameter at the widest. She likes to burrow into the sand so only a portion of the shell is exposed. Recently, diatoms have turned up on the dsb and I have no clue why. The last rock added was about 1.5 months ago but it wasn't live rock. It went in because I bought an anemone that was attached to it.
If this snail starts on the diatoms, I will get more. There are bunches of them at the beach during low tide. I just have to quarentine them for a while...