The most expensive fish to eat was a 222-kilogram bluefin tuna. It was sold at Tokyo's Tsukiji market for ?155.4 million ($1.8 million) at Japan's annual New Year auction in January 2013. This was equivalent to $8,000 pe... More »

Bluefin tuna is expensive because it’s in such high demand in Japan. According to “Why Tuna's Both Cheap and Expensive, Plentiful and Very Endangered,” a bluefin tuna caught off Long Island goes straight to Japan, where ... More »

For day-to-day feeding, most pet owners prefer to feed betta fish freeze-dried food. These fish actually prefer live food, but freeze-dried food is less expensive and more readily available. More »

Animals that eat fish include other fish like sharks, pikes, walleye, barracudas, mackerel, tuna, swordfish, marlin, groupers, species of bass and codfish. Mammals that eat fish include dolphins, black and brown bears, s... More »

Herbivorous (plant-eating) and omnivorous (plant- and meat-eating) fish include damselfish, gobies, parrotfish, rabbitfishes, Nile tilapia and bluefin tuna. Herbivorous and omnivorous fish can be found in both fresh and ... More »

Mako sharks primarily feed on schooling fish like mackerel, anchovy and tuna. However, as a pelagic — open-ocean — shark, the mako is necessarily a opportunistic feeder that feeds on a variety of other prey, such as crus... More »

Some foods that are bad to eat when a person has gout are organ meats, such as beef liver and kidney, and certain fish, such as tuna, herring, mackerel and anchovies, according to Mayo Clinic. These foods are high in pur... More »

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