I found this snail in my tank after about 8 months of having my tank and I have watched it grow since it was a tiny baby now that it's big and I still can't figure out what it is. I have 3 zombie snails, 3 margarita snails, and two conchs. It looks similar to a zombie snail (nassarius snail) but has different coloring, patterns, and behavior. She has a really dark coloring compared to my zombie snails (all light gray colored), striped patterns, has stayed this size for about 2 months, and doesn't like to stay in the sand like my other zombie snails instead she is always on the glass of the tank. I have never once seen her buried in the sand like my other zombie snails. Does anyone know what she could be?
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