[TRAIN] Zurich to Venice - direct train - is that a thing?

Im thinking about travelling from Zurich to Venice. Listening to you guys I have reorganized the dates and feel much more comfortable now (London 5N, Paris 4N, Zurich 2N, Venice 2N, Florence 3N, Rome 5N), but I would still need to take the long way from Zurich to Venice.

It seems like there’s a route through Milan that is more common, but i also saw a direct option once a day, in some days, in Europe Rail. Is that a real thing, I mean, have you guys ever done it? Cause its like a 6h train ride. Thanks in advance!