The Thessaloniki to Vathy ferry is operated by one ferry company: Blue Star Ferries. This route connects the Greek mainland to the Aegean Islands and you can take your car on this route or travel as a foot passenger. This route is offered by conventional (not fast) ferries.
You can travel with your pet (cat or dog). The average price for a one way foot passenger crossing in July is 42 Euros and for a car 130.50 Euros.