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For example, when sperm whales are approached by boats they surface less, shorten the intervals between breathes and do not show their fluke before diving as often. [49] Cetaceans may also reduce their acrobatic surfacing behaviours, such as when humpback whale groups without calves are approached by vessels to within 300 m. [51]
Whales are fully aquatic, open-ocean animals: they can feed, mate, give birth, suckle and raise their young at sea. Whales range in size from the 2.6 metres (8.5 ft) and 135 kilograms (298 lb) dwarf sperm whale to the 29.9 metres (98 ft) and 190 tonnes (210 short tons) blue whale, which is the
Sperm whales have the largest brain mass of any animal on Earth, averaging 8,000 cm 3 (490 in 3) and 7.8 kg (17 lb) in mature males. [23] The brain to body mass ratio in some odontocetes, such as belugas and narwhals, is second only to humans. [24] In some whales, however, it is less than half that of humans: 0.9% versus 2.1%. [citation needed]
About 650 pilot whales beached themselves at the top of South Island, killing 335 of them. The others were able to swim away at high tide or were refloated by volunteers. [30] [31] [32] South Island, New Zealand: 500+ 500+ 0 1897 More than 500 pilot whales died at Teal Inlet. [33] Teal Inlet, Falkland Islands: 470 362 108 2020
Among the findings, described in two studies published over the summer, are that gray whales rely on different swimming techniques to collect food based on their sizes and ages and that larger ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 2 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 ...
[37] [72] Belugas swim on the surface between 5% and 10% of the time, while for the rest of the time they swim at a depth sufficient enough to cover their bodies. [37] They do not jump out of the water like dolphins or killer whales.
To do so, they dive deeper and for longer periods of time than blue whales in other regions of the world, with dives of 10.7 minutes on average, and a hypothesized dive depth of about 300 meters. Fecal analysis also found the presence of fish, krill, amphipods, cephalopods, and scyphozoan jellyfish in their diet. [79]