The liver in a fish serves digestion, waste removal and storage functions. The liver produces bile, which aids in the digestion of food as it processes through the stomach and intestines. This organ also serves as a food reserve, sustaining the fish when food resources are scarce.Know More
Fish livers function analogously to the livers of many other animals, including humans. Bile is produced by the liver to break down fats and proteins, which allows the digestive system to extract more nutrients as food processes through the body. The liver is also used to remove waste from the blood and to aid in recycling old blood cells.
The livers of many fish species are rich in omega-3 fatty acids and vitamins A and D. Because of this characteristic, fish livers and fish liver extracts, especially from cod, are used in the production of nutritional supplements that are routinely consumed by humans.
The livers of sharks, skates and rays serve the added function of providing a means of remaining neutrally buoyant in the ocean. Shark livers contain high levels of a chemical called squalene, which serves as a substitute for a swim or air bladder that is found in species of bony fish.Learn more in Fish
The most common disease to cause a fish to swim sideways is swim bladder disease. This "disease" is a actually a broad term for a variety of symptoms such as swimming sideways, upside down and leaning to one side.Full Answer >
According to the National Wildlife Federation, flying fish live in the open waters of tropical and temperate oceans, including the Atlantic, Pacific and Indian Oceans. Flying fish live on a diet of plankton and grow up to 18 inches in length although they normally range between 7 and 12 inches.Full Answer >
Blood parrot fish, the aquarium fish commonly called parrot fish, should be housed only with mid-sized non-aggressive fish such as tetras, danios, angelfish and catfish. Aggressive species should be avoided because parrot fish cannot compete well for food.Full Answer >
By definition, fish are animals that live in water, have gills and lack limbs. They are also chordates, which means they have a backbone-like structure that provides support for the body and acts as an anchor for the major muscles.Full Answer >