About the Book
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 97. Chapters: Albacore, American eel, Anglerfish, Antarctic Toothfish, Atlantic bluefin tuna, Atlantic blue marlin, Atlantic halibut, Atlantic salmon, Barndoor skate, Bigeye tuna, Blackfin tuna, Black marlin, Blue grenadier, Bottlenose skate, Cod, Cod (food), Common sole, Deepwater redfish, Eel (food), European plaice, Gadus, Greenland halibut, Haddock, Indian prawn, Japanese eel, Lamniformes, Lophius americanus, Lophius piscatorius, Makaira, Maltese skate, Marlin fishing, Orange roughy, Pacific bluefin tuna, Patagonian toothfish, Penaeus monodon, Rose fish, School shark, Shortfin mako shark, Sole (fish), Southern bluefin tuna, Spiny dogfish, Spotback skate, Striped marlin, Swordfish, Tiger shark, Whiteleg shrimp, White marlin, Yellowfin tuna. Excerpt: A tuna is a saltwater finfish that belongs to the tribe Thunnini, a sub-grouping of the mackerel family (Scombridae) which together with the tunas, also includes the bonitos, mackerels, and Spanish mackerels. Thunnini comprises fifteen species across five genera, the sizes of which vary greatly, ranging from the bullet tuna (max. length: 50 cm (1.6 ft), weight: 1.8 kg (4 lb)) up to the Atlantic bluefin tuna (max. length: 4.6 m (15 ft), weight: 684 kg (1,508 lb)). The bluefin averages 2 m (6.6 ft), and is believed to live for up to 50 years. Their circulatory and respiratory systems are unique among fish, enabling them to maintain a body temperature higher than the surrounding water. An active and agile predator, the tuna has a sleek, streamlined body, and is among the fastest-swimming pelagic fish the yellowfin tuna, for example, is capable of speeds of up to 75 km/h (47 mph). Found in warm seas, it is extensively fished commercially and is popular as a game fish. As a result of over-fishing, stocks of some tuna species, such as the Southern bluefin tuna, have been reduced dangerously close to the point of extinction. The term tuna derives from, the Middle Latin form of the Greek: "tunny-fish" which is in turn derived from, "to rush; to dart." The Thunnini tribe is a monophyletic clade comprising fifteen species in five genera: The cladogram is a tool for visualizing and comparing the evolutionary relationships between taxons, and is read left-to-right as if on a timeline. The following cladogram illustrates the relationship between the tunas and the other tribes of the family Scombridae. For example, the cladogram illustrates that the skipjack tunas are more closely related to the true tunas than are the slender tunas (the most primitive of the tunas), and that the next nearest relatives to the tunas are the bonitos of the Sardini tribe. Relative sizes of various tunas, with the Atlantic bluefin tuna (top) at about 8 ft (2.4 m) in this sampleThe 'true' tuna
