Transportation between Rab Island and Rovinj in Croatia.

If you go to Google Maps, then "Get Directions" and then enter "Rab, Croatia" in field A and "Rovinj, Croatia" in field B, then click on the pedestrian above that search field and then on "Get Directions" you see what set of ferry connections there should be to get from Rab island at least close to Rovinj... Also there is info on ferry lines to and from Rab on Rab-Croatia.com.

Not directly. I think the best you could do would be to take the ferry from Rab to Rijeka (passengers only, no cars), then bus from Rijeka to Rovinj. Hope that helps.