Better than in an aquarium because you can't see them as well, they're not so exposed and bare and on display. This way a slight bit of mystery left as you gliimpse into this other world.

The more pond plants for them to hide beneath, the better. But got the plants late so they haven't grown like they can. Next year surface will be mostly covered by August.

The less seen, the better. The more clearly you can see, the more you realize what a sad life they actually have.

Except the snails, they move so slow I at least imagine they are forever dreaming on some level.