How Long Can A Snail Live Hidden?

[blondeguppy]

I have had my tank up for a few years now. I haven't put any new plants in in probably 2 years? No new snails in over a year. All my snails died off a while ago (like 2018 or before), except occasionally I see what I assume are baby assassin snails.
In the tank I have two silver flying fox fish and one guppy. It is 190L...Today on the pump for the UV light, I saw a big black fat snail on it.
Trying to figure out where it came from?? Any ideas??

 

[mimo91088]

Sounds like maybe MTS? They hide under the substrate when the lights are on. Did you manage to get a pic?

 

[ETNsilverstar]

They're great hiders, so it was probably just coming out when you had the lights off so you never saw it.

 

[blondeguppy]

When the other snails were alive, I would see occasional trails across the glass. I haven't seen any trails in a long time.

 

[ETNsilverstar]

I've never seen trails on the glass with mine, so it could be a different snail than the others you had.