Depends really. Is it in a planted tank or have you noticed it eating LIVE plants? It appears to be an Asolene Spixi indeed however it is hard to tell the difference between a spixi and a hybrid marisa/spixi. The only real difference, that I know of, is the marisa/spixi hybrid eats plants whereas the spixi doesn't. Either way I must tell you that it is illegal to transport, either by mailing or driving them, across state lines.
P.S.-I have SO many spixis they are truly my favorite snail.