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Pygmy blue whale males average 83.5 tonnes (184,000 lb) to 99 tonnes (218,000 lb). [54] The weight of the heart of a stranded North Atlantic blue whale was 180 kg (400 lb), the largest known in any animal. [55] The record-holder blue whale was recorded at 173 tonnes (190 short tons), [56] with estimates of up to 199 tonnes (220 short tons). [57]
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.
Conversely the increase in baleen whale size may have contributed to the extinction of megalodon, as they may have preferred to go after smaller whales; bite marks on large whale species may have come from scavenging sharks. Megalodon may have simply become coextinct with smaller whale species, such as Piscobalaena nana. [109]
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A beaked whale is any of at least 22 species of whale in the family Ziphiidae. Several species have only been described in the last two decades. Six genera have been identified. They possess a unique feeding mechanism among cetaceans known as suction feeding. They are characterized by having a lower jaw that extends at least to the tip of the ...
The species is known to be cannibalistic. [7] In the Gatun Formation of Panama, fossil teeth belonging to great hammerheads suggest the shark once preyed on juvenile Otodus megalodon, alongside the extinct snaggletooth shark Hemipristis serra, with which it was once contemporary. [17]
An underwater photographer who got up close and personal with a massive blue whale says the experience left him feeling awestruck — and incredibly small. Stunning photo shows diver's close ...
The blue whale has the largest penis of any organism on the planet, typically measuring 2.4–3.0 metres (8–10 ft). [118] Accurate measurements of the blue whale are difficult to take because the whale's erect length can only be observed during mating. [119]