Add to that prices that range from 25 cents to almost $3 per ounce, and you can feel like a fish out of water at the market.

So what is the best tuna to buy? Of course it depends on what you are making, and if you are eating it unadorned, or mixing it with mayo for a salad. To determine the best-tasting, we held a blind test of all kinds of tuna.

For starters, there are two types of canned tuna: light, which usually contains skipjack or bluefin tuna; and white, also known as albacore tuna. Light tuna is generally darker in color with a slightly stronger flavor than white albacore tuna.

First canned in 1903, tuna quickly became the best-selling seafood in the country and established itself as a favorite ingredient for sandwiches, casseroles and salads.

But in recent years, tuna fish has made news, first in the 1990s with concerns about dolphin safety. Earlier methods of catching tuna unfortunately also resulted in the capture and/or death of many dolphins, which often swim with tuna. Today, almost all tuna sold in the supermarket is labeled "Dolphin-Safe," a federally regulated notation that certifies that no dolphins were "chased, encircled, or killed" in the catching of the tuna.

More recently, tuna has again been in the news over concerns of mercury levels found in the fish. The FDA, however, has determined that the trace amounts of mercury found in canned tuna pose no real health risks when consumed in limited amounts. Even pregnant women can safely eat canned tuna in moderation.

So, once you swim through the moral and health issues, how do you know which tuna to buy?

To find out which tuna tastes best, we gathered eight brands of tuna in an array of preparations. Six of the tunas were purchased at local supermarkets. Two of the tunas came from specialty market Di Bruno Bros., and the prices reflected that: at $2.99 per ounce, the Serrats White Tuna in Olive Oil cost more than ten times the generic Acme store brand. But does price equal quality?

In a word, yes. The top three tunas in the rankings were all specialty brands, though Cento, an Italian supermarket brand, was more reasonably priced at 43 cents per ounce. The first and third place finishers, however, were the specialty brands from Di Bruno Bros. Both brands came in jars or cans packed in oil.

Overall, tasters preferred tunas packed in oil, which generally have been cooked and processed in the oil. Many tuna experts and manufacturers believe that water leaches out flavor. Tasters agreed, noting much more flavor in the tunas packed in oil over those packed in water.

Despite albacore's growing popularity, tasters largely preferred the light tuna, noting a stronger flavor and more moist texture. Not all light tunas are created equal, however: Progresso Light Tuna came in last in the tasting, the flavor unfortunately overwhelmed by a decidedly mushy texture.

But take heart, you don't necessarily need to run out and spend $11.99 on a can of tuna. We also held a blind tasting of the supermarket brands of tuna mixed with mayonnaise to find out if flavor and texture differences would be as noticeable. They weren't. Cento topped that tasting, but all of the other brands were close behind.

So what tuna should you buy? Cento is the best choice for all your tuna needs, coming in at the top of both our plain and mixed-with-mayo tastings, a good all-around tuna to keep on hand. But if you only eat tuna with mayonnaise, I would buy whatever is on sale.