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The family Balaenidae, the right whales, contains two genera and four species. All right whales have no ventral grooves; a distinctive head shape with a strongly arched, narrow rostrum, bowed lower jaw; lower lips that enfold the sides and front of the rostrum; and long, narrow, elastic baleen plates (up to nine times longer than wide) with fine baleen fringes.
Conservationists are pleased that the sei whale continues to be listed as endangered, but Japan says that the species has swelled in number from 9,000 in 1978 to about 28,000 in 2002, so its catch of 50 sei whales per year is safe and the classification of endangered should be reconsidered for the North Pacific population.
[123] [124] The protected status of North Atlantic blue whales was not recognized by Iceland until 1960. [125] In the United States, the species is protected under the Endangered Species Act. [65] Blue whales are formally classified as endangered under both the U.S. Endangered Species Act [126] and the IUCN Red List. [1]
Some cetaceans may forage with other kinds of animals, such as other species of whales or certain species of pinnipeds. [75] [76] Large whales, such as mysticetes, are not usually subject to predation, but smaller whales, such as monodontids or ziphiids, are. These species are preyed on by the orca.
Spade-toothed whales are the world’s rarest, with no live sightings ever recorded. ... possibly shedding clues on species. CHARLOTTE GRAHAM-McLAY. July 16, 2024 at 3:33 AM ... USA TODAY Sports.
Scientists estimate only about 356 right whales, plus or minus seven, are alive today. In recent years, much of the population has spent time in Cape Cod Bay before proceeding further north for ...
Unlike most animals, whales are conscious breathers. All mammals sleep, but whales cannot afford to become unconscious for long because they may drown. They are believed to exhibit unihemispheric slow-wave sleep, in which they sleep with half of the brain while the other half remains active. This behavior was only documented in toothed whales ...
North Atlantic right whales have been listed as endangered under the Endangered Species Act since 1970, according to the National Oceanic and Atmospheric Administration. Latest estimates suggest ...