Snails are some of the biggest poopers around.
My fish eat way more plants than any snails have, then the snails will clean up dying edges of the bitten places on the leaves.
Less food for less snails.
Assassin snails can kill any small or large snail and have heard (not my experience as I wouldn't have been able to notce that)) they will ambush shrimp. I was recently told by a scholarly fish enthusiast that they use a bit of neurotoxin. So since I am not a scientist and haven't read that info my self, I have no real knowledge as fact other than I woud believe this person and would have no reason not to.
That would explain how they can take down a Mystery snail.
My fish eat way more plants than any snails have, then the snails will clean up dying edges of the bitten places on the leaves.
Less food for less snails.
Assassin snails can kill any small or large snail and have heard (not my experience as I wouldn't have been able to notce that)) they will ambush shrimp. I was recently told by a scholarly fish enthusiast that they use a bit of neurotoxin. So since I am not a scientist and haven't read that info my self, I have no real knowledge as fact other than I woud believe this person and would have no reason not to.
That would explain how they can take down a Mystery snail.