Transportation in Chioggia

Greetings,
My wife and I are getting off a cruise ship in Chioggia, near Venice. We are heading to Bologna after we exit the ship. On trenitalia, I see a bus from Chioggia to Rovigo, then a train to Bologna. I have two questions: Is there a train that leaves from Chioggia, instead of taking a bus?
If not, is there transport (taxi, etc.) from the Chioggia cruise dock to the bus station?
Or will we need to hoof it to the bus station?
I guess that's three questions...
Any help is appreciated, thanks.