List of largest fish
Fish vary greatly in size. The whale shark and basking shark exceed all other fish by a considerable margin in weight and length.
Posted 3 months ago in Other.
1 Unique Visitors
Hagfish (Myxini)The hagfish, which are not taxonomically true fish, are among the most primitive extant vertebrates. There is only one order and family in this animal class. All of the 77 known species have elongated, eel-like bodies but can be distinguished by their downward-facing mouths. The largest form is the Goliath hagfish (Eptatretus goliath). This species can range up to 1.28 m (4.2 ft) in length and weigh to 6.2 kg (14 lb).As with the hagfish, lampreys appear eel-like in shape. They have cartilaginous skeletons and have been evolving separately from any other group for over 400 million years. They are predatory and often attach themselves to a fish or other small animal and gradually drain blood and organs. The largest species is the sea lamprey (Petromyzon marinus), which can grow to 1.2 m (3.9 ft) and weigh 2.5 kg (5.5 lb).
The largest living bony fish (superclassOsteichthyes, which includes both ray-finnedand lobe-finned fish) is the widely distributed ocean sunfish (Mola mola) and southern sunfish (Mola alexandrini), both being members of the order Tetraodontiformes. The record size ocean sunfish crashed into a boat off Bird Island, Australia in 1910 and measured 4.3 m (14 ft) from fin-to-fin, 3.1 m (10 ft) in length and weighed about 2,300 kg (5,100 lb). While the biggest Mola alexandrini was also coincidentally 2,300 kg in mass and 3.0 m in length, caught off in 1996 and misidentified as a Mola mola.
As to length, the longest extant bony fish on earth is the oarfish (Regalecus glesne). Slender and compressed, it averages over 6 m (20 ft) long at maturity. A specimen caught in 1885 of 7.6 m (25 ft) in length weighed 275 kg (606 lb). The longest known example, which was hit by a steamship, was measured as 13.7 m (45 ft) long, but unverified specimens have been reported up to 16.7 m (55 ft).
Much larger bony fish existed prehistorically, the largest ever known having been Leedsichthys, of the Jurassic period in what is now England. This species is certainly the largest bony fish ever and perhaps the largest non-cetacean marine animal to have ever existed. Estimates of the size of this fish range from 21 to 27 m (69 to 89 ft) and mass from 20 to 50 tons. A maximum size of 22 m (72 ft) and 25–30 tons has been deemed to be most realistic.
The largest species is the beluga sturgeon(Huso huso) of the Caspian and Black seas, the only extant bony fish to rival the massiveness of the ocean sunfish. The largest specimen considered reliable (based on remains) was caught in the Volgaestuary in 1827 and measured 7.3 m (24 ft) and weighed 1,474 kg (3,250 lb). The slightly smaller kaluga (Huso dauricus) or great Siberian sturgeon has been weighed reliably up to 1,140 kg (2,510 lb) (Berg, 1932) and a length of 5.6 m (18 ft).The North American white sturgeon(Acipenser transmontanus), unverified to 907 kg (2,000 lb) and 6.1 m (20 ft), Chinese, European Oceanic, and the Russian sturgeon (A. gueldenstaedtii), at as much as 1,000 kg (2,200 lb) and 5.5 m (18 ft) for a 75-year-old female, also can attain great sizes. Atlantics and Baikal sturgeons are following as well. These fish are sometimes called the largest freshwater fish but sturgeons spend a great deal of time in brackish water and switch back and forth between saltwater and freshwater environments in their life cycle. Also included in this order are the paddlefish and the Chinese Paddlefish (Psephurus gladius), which may now be extinct and is at least critically endangered, is also a very large fish. Reportedly, fisherman as recently as the 1950s have caught paddlefish measuring up to 6.7 m (22 ft) in total length, although no specimen greater than 3.1 m (10 ft) has been scientifically measured. The weight of the Chinese Paddlefish is reportedly 300 to 500 kg (660 to 1,100 lb).