well all i had in my tank was playground sand a couple fish and this lil snail...looks like a crab shell but a snail inside...its freshwater too...maybe someone can iform me of what this is...they started super tiny and this one is the biggest as of now
Malaysian Trumpet Snail (MTS). They are harmless, consume random detritus in the tank, and add very little to your bioload. Most people just think of them as nuisances/pests, I think of them as a great addition to your artificial ecosystem.