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The blue whale (Balaenoptera musculus) is a marine mammal and a baleen whale.Reaching a maximum confirmed length of 29.9 m (98 ft) and weighing up to 199 t (196 long tons; 219 short tons), it is the largest animal known ever to have existed.
This is an accepted version of this page This is the latest accepted revision, reviewed on 30 January 2025. Large baleen whale species Humpback whale Temporal range: 7.2–0 Ma Pre๊ ๊ O S D C P T J K Pg N Late Miocene – Recent Size compared to an average human Conservation status Least Concern (IUCN 3.1) CITES Appendix I (CITES) Scientific classification Domain: Eukaryota Kingdom ...
The gray whale (Eschrichtius robustus), [1] also known as the grey whale, [5] is a baleen whale that migrates between feeding and breeding grounds yearly. It reaches a length of 14.9 meters (49 ft), a weight of up to 41 tonnes (90,000 lb) and lives between 55 and 70 years, although one female was estimated to be 75–80 years of age.
It can constitute as much as 50% of a whale's body weight. Calves are born with only a thin layer of blubber, but some species compensate for this with thick lanugos. [40] [41] Whales have a two- to three-chambered stomach that is similar in structure to those of terrestrial carnivores.
The largest confirmed weight of a giant octopus is 74 kg (163 lb), [253] 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). [254] 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]
Between 40% and 50% of their body weight is fat, which is a higher proportion than for cetaceans that do not inhabit the Arctic, where fat only represents 30% of body weight. [ 39 ] [ 40 ] The fat forms a layer that covers all of the body except the head, and it can be up to 15 cm (5.9 in) thick.
The fin whale (Balaenoptera physalus), also known as the finback whale or common rorqual, is a species of baleen whale and the second-longest cetacean after the blue whale. The biggest individual reportedly measured 26 m (85 ft) in length, with a maximum recorded weight of 77 to 81 tonnes (85 to 89 short tons ; 76 to 80 long tons ).
An adult female is 15 m (49 ft) [14] and can weigh up to 47 tonnes (46 long tons; 52 short tons), [14] with the larger records of 17.5–18 m (57–59 ft) [15] [16] in length and 80 tonnes (79 long tons; 88 short tons) [17] or up to 90 tonnes (89 long tons; 99 short tons) in weight, [18] making them slightly smaller than other right whales in ...