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Although it averages about 1.36 m (4.5 ft) in length, this huge worm can reach a length of as much as 6.7 m (22 ft) and can weigh over 1.5 kg (3.3 lb). [239] Only the giant Gippsland earthworm , Megascolides australis , and a few giant polychaetes , including the notorious Eunice aphroditois , reach nearly comparable sizes, reaching 4 and 3.6 m ...
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.
The narwhal has a robust body with a short, blunt snout, small upcurved flippers, and convex to concave tail flukes. Adults measure 3.0 to 5.5 m (9.8 to 18.0 ft) in length and weigh 800 to 1,600 kg (1,800 to 3,500 lb). [20] [21] [22] Male narwhals attain sexual maturity at 12 to 20 years of age, reaching a length of 3.5 to 4.0 m (11.5 to 13.1 ft).
Whales, the ocean’s largest marine mammals, renowned for their immense size and exceptional adaptability can be found roaming waters all over the world. From the depths of the Arctic to warm ...
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.
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 ...
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 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 ).