Cruise line shareholders can access exclusive onboard credits, turning your investment in cruise stocks into discounts at sea.

Living on a mass-market cruise ship can start at about $35,000 per year for room and board. Additional expenses include medical costs, laundry and alcohol, which can increase the overall cost.

Royal Caribbean celebrated its loyalest passenger earlier this month, a Cuban national named Mario Salcedo who's been living on the company's cruise ships permanently for nearly 25 years.

The cruise industry is experiencing ... introducing new spaces on the ship. There are also upgrades that passengers likely won’t see first-hand but will benefit from improvements such as more ...