Snail behaviour

[Toms_Aqaurium]

Morning all.

So I have a collection of Nerites and I've noticed some strange behaviour from some of them. So just wanted to check it was normal .

Since I introduced the black helmets. I can't find them. I saw one half burrowed. So are these known for burrowing into the substrate and using it as a hidey hole?

The more pressing issue, is one of my Zebra snails keeps ending up on his side or back. I will right him - and a couple of minutes later he will be moving up the glass or along the floor. But the next day - same area he will be on his back or side. None of the others do it - it is always near a bit of drift wood - which the shrimp use as there lots of holes and gaps. If I left him, would he be able to file himself over or is something else happening.

assassin snails - do these tend to be nocturnal. As I have not seen any of these since I introduced them. I know they like to burrow - and there is plenty of food for them, as the 'pest' snails are growing in numbers and size. So worried that these may have just died under the substrate.

Thanks.

[Redpanda]

Assassins tend to bury themselves for a period I think that’s normal, but when they hunt they can attack nerites and other big snails , so best not to keep them together . When I got nerites, I removed my assassins straight away..

[Toms_Aqaurium]

Oh I thought that assassins didn't attack bigger snails - and only attacked or hunted when the food supply was low. Such a big learning curve.

[plankton]

The zebra will usually right themselves, which is a proper sight if you see it!
It's usually because they've eaten their fill and rest for 2 or 3 days. (that's when the assassins will move in)
Never had the black helmet nerites, but the limpet nerites do really weird things and get into some difficult places.

[Toms_Aqaurium]

Touch wood. So far no empty snail shells. Apart from one assassin. And another assassin that has also died.