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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 per kilogram.


Just as in humans and other types of animals, fish eat by taking food in through the mouth. Food starts to break down in the mouth before being moved along to the stomach, where enzymes work to break the food down even further. After leaving the stomach, food moves along the intestine, where it is b


Small freshwater fish typically eat vegetation, insects, larvae, leeches, shrimp and dead or decaying matter, and small saltwater fish, called forage or feed fish, eat plankton. The tiny American herring eats small and larval shrimp as do both Atlantic and Pacific cod.


Fish like to eat plants and other organisms depending on their size and habitat. Fish that live in lakes will naturally eat commonly occurring flies that are most numerous in their habitat. Larger fish will eat smaller fish, and bottom feeding fish will eat dead organisms or waste that sinks to the


The most common cause of appetite loss in fish is stress. The stress from overcrowding or transitioning to a new aquarium can cause a fish to stop eating for more than two days.


WebMD explains that scombrotoxin poisoning is an allergic illness caused by the ingestion of spoiled fish. Symptoms include a burning sensation inside the mouth, dizziness, diarrhea, headache and an itching rash. Scombrotoxin can be treated with antihistamines, and its symptoms typically dissipate w


Sources disagree on whether dogs can eat fish safely. K9 Magazine says that fish are a high-quality source of omega-3 fatty acids, while Dr. Karen Becker says that most fish in the pet food industry is preserved using carcinogenic ethoxyquin and should be avoided.


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, seals and sea lions, sperm whales, gray whales, killer whales, fin whales, and hu


Most small fish and those that don't contain high levels of mercury are safe for the majority of the population to eat. Pregnant women, children and people with other health concerns should talk their doctors to ensure they are following established guidelines for safe eating. Properly handling and


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 saltwater.