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While all cruise lines strive to serve the freshest fare possible, some items may be out at the buffet for a tad too long. Because seafood expires rapidly unless it's stored in precise temperatures, don't scoop up a maki that'll turn your stomach into a kamikaze; opt for something that's made to order right in front of you.

You know those huge tubs of scrambled eggs that are a staple at the breakfast buffet? Many cruise lines make those hours in advance from a powdered mix, which results in a wet or mushy consistency. Avoid that giant vat and head to the made-to-order station instead, where you can get a fresh omelet cooked up right in front of you, with healthy fillings, too.

Since most ships have stopped hosting midnight buffets, late-night snack options can be slim. Pizza, though, seems to be available around the clock—but be sure you look closely before you slide a slice onto your plate. If the cheese seems hard, that means it's probably been under the warming lights for quite some time. Don't be shy about asking for a fresh pie.

Cruising is all about overindulging, whether it's drinking, gambling, or eating. And some mega ships feed 6,000 passengers and 2,200 crew—many of whom will dine at the ship's cafeteria. While these all-you-can-eat adventures may sound delicious (who wouldn't want unlimited ice cream?), you should seriously stay away from the buffet. In fact, one infectious disease specialist told VICE that cruise ship buffets can be "cesspools for bacteria and viruses." Yikes!