The largest hammerhead shark is the great hammerhead ( Sphyrna mokarran), which can reach 6.1 m (20 ft) and weigh 500 kg (1,100 lb). falciformis) is another contender for the largest requiem shark at a maximum weight of 350 kg (770 lb) and a maximum length of around 3.5 m (11 ft). leucas) has been estimated to weigh about 575 kg (1,268 lb) in recent specimens that measured over 4 m (13 ft) long. The largest of the infamous "requiem sharks" (in the genus Carcharhinus) seems to be the dusky shark ( C. A female caught in 1957 reportedly measured 7.4 m (24 ft) and weighing 3,110 kg (6,860 lb), although this very outsized shark is not known to have been confirmed. One specimen, a gravid female caught off Australia and measuring only 5.5 m (18 ft) long, weighed an exceptional 1,524 kg (3,360 lb). Specimens have been verified to at least 5.5 m (18 ft) but even larger ones have been reported. The largest species of this order is the widely distributed tiger shark ( Galeocerdo cuvier). Ī large tiger shark ranks as the biggest of ground sharks. Although many are dubious, there are several reports of larger whale sharks, with reliable sources citing unverified specimens of up to 37 tonnes and 17 m (56 ft). The largest verified specimen was caught in 1949 off Karachi, Pakistan and was 12.7 m (42 ft) long and weighed 21.5 tonnes. An average adult of this species measures 9.7 m (32 ft) long and weighs an average of 9 tonnes. It is also the largest living animal that is not a cetacean and, like the largest whales, it is a docile creature that filter-feeds on tiny plankton. The largest living cartilaginous fish, of the order Orectolobiformes, is the whale shark ( Rhincodon typus), of the world's tropical oceans. The cartilaginous fish are not directly related to the "bony fish," but are sometimes lumped together for simplicity in description. Cartilaginous fish (Chondrichthyes) A size comparison of a whale shark and a human Titanichthys reached a length of 7 m (23 ft) though in older paper it was estimated at 7.5 m (25 ft). Its filter feeding relative, Titanichthys, may have rivaled it in size. terrelli, which grew almost 9 m (29.5 ft) in length and 4 t (4.4 short tons) in weight. The largest and most well known species was D. The largest fish of the now-extinct class Placodermi was the giant predatory Dunkleosteus. 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). They are predatory and often attach themselves to a fish or other small animal and gradually drain blood and organs. They have cartilaginous skeletons and have been evolving separately from any other group for over 400 million years. Sea lamprey feeding on a lake trout As with the hagfish, lampreys appear eel-like in shape. This species can range up to 1.28 m (4.2 ft) in length and weigh to 6.2 kg (14 lb). The largest form is the Goliath hagfish ( Eptatretus goliath). All of the 77 known species have elongated, eel-like bodies but can be distinguished by their downward-facing mouths. There is only one order and family in this animal class. The hagfish, which are not taxonomically true fish, are among the most primitive extant vertebrates. As such, cross group comparisons on this page only serve a colloquial purpose. Fish are a paraphyletic group that describes aquatic vertebrates while excluding tetrapods, and the bony fish that often represent the group are more closely related to cetaceans such as whales, than to the cartilaginous fish such as sharks and rays. The whale shark and basking shark exceed all other fish by a considerable margin in weight and length.
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