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Size of Paraceratherium (dark grey) compared to a human and other rhinos (though one study suggests Palaeoloxodon namadicus may have been a larger land mammal). The blue whale is the largest mammal of all time, with the longest known specimen being 33 m (108.3 ft) long and the heaviest weighted specimen being 190 tonnes.
The blue whale is the largest animal known ever to have existed. [42] [43] [44] Some studies have estimated that certain shastasaurid ichthyosaurs and the ancient whale Perucetus could have rivalled the blue whale in size, with Perucetus also being heavier than the blue whale with a mean weight of 180 t (180 long tons; 200 short tons).
Perucetus is the largest Eocene whale measuring about 17–20 meters (56–66 ft) long. Some researchers claim that it may have rivaled or exceeded the modern blue whale in weight, partly due to the incredibly thick and dense bones this animal possessed, coupled with its already great size, while others argue that it was much lighter. [ 2 ]
The largest lamprophids Cape file snake (Heterolepsis capensis) is a medium to large snake. With an average total length (including tail) of about 120 cm (3 ft 11 in), specimens of 165 cm (5 ft 5 in) total length have been recorded.
Compared to odontocetes, the efficiency of baleen whales' filter feeding scales more favorably with increasing size when planktonic food is dense, making larger sizes more advantageous. The lunge feeding technique of rorquals appears to be more energy efficient than the ram feeding of balaenid whales; the latter technique is used with less ...
Original description : A size comparison of four different snakes; comparing large individuals of the extant green anaconda (Eunectes murinus) and reticulated python (Malayopython reticulatus) to total length estimates of the extinct Gigantophis and Titanoboa. • The green anaconda is the largest (most massive) extant snake.
“The size of these magnificent creatures was incredible," Fry said in a news release earlier this month. "One female anaconda we encountered measured an astounding 6.3 meters (20.8 feet) long."
Livyatan is the largest fossil sperm whale discovered, and was also one of the biggest-known predators, having the largest bite of any tetrapod. [1] [8] Diagram comparing the upper and lower size estimates of Livyatan (bottom three) with the size of mature sperm whales, including one of the largest individuals recorded (top three), and a human