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Megalodon. Otodus megalodon (/ ˈmɛɡələdɒn / MEG-əl-ə-don; meaning "big tooth"), commonly known as megalodon, is an extinct species of giant mackerel shark that lived approximately 23 to 3.6 million years ago (Mya), from the Early Miocene to the Early Pliocene epochs.
The most species-rich shark family, the catsharks, are fairly small-bodied. The largest, the nursehound (Scyliorhinus stellaris), can grow up to 1.7 m (5.6 ft) and a weight of at least 10.8 kg (24 lb). [32][33] Chimaeras (Chimaeriformes) These odd, often translucent cartilaginous fish are typically quite small.
In zoology, megafauna (from Greek μέγας megas "large" and Neo-Latin fauna "animal life") are large animals. The precise definition of the term varies widely, though a common threshold is approximately 45 kilograms (99 lb), with other thresholds as low as 10 kilograms (22 lb) or as high as 1,000 kilograms (2,200 lb).
The heaviest known pantherine felids are the Ngangdong tiger (Panthera tigris soloensis), which are estimated to have weighed up to 486 kg (1,071 lb), [176] the extinction lion Panthera fossilis, which has been estimated to have maximum weight of 400–500 kg (880–1,100 lb), [182] the American lion (Panthera atrox), weighing up to 363 kg (800 ...
The largest confirmed weight of a giant octopus is 74 kg (163 lb), [254] with a 7 m (23 ft) arm span (with the tentacles fully extended) and a head-to-tentacle-tip length of 3.9 m (13 ft). [255] Specimens have been reported up to 125 kg (276 lb) but are unverified. A weight of 10 - 50kg is a much more common size. [1]
In 2002, Stephen Wroe considerably downsized megalania, suggesting a maximum total length of 4.5 m (15 ft) and a weight of 331 kg (730 lb) with average total lengths of 3.45 m (11.3 ft) and 97–158 kg (214–348 lb), [12] decrying the earlier maximum length estimate of 7 m (23 ft) as exaggerations based on flawed methods. In 2009, however ...
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The megamouth shark (Megachasma pelagios) is a species of deepwater shark. Rarely seen by humans, it measures around 5.2 m (17 ft) long and is the smallest of the three extant filter-feeding sharks alongside the relatively larger whale shark and basking shark. According to Sharkman's World Organization a total of 286 specimens have been ...