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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.
Six species of dolphins have the word "whale" in their name, collectively known as blackfish: the orca, or killer whale, the melon-headed whale, the pygmy killer whale, the false killer whale, and the two species of pilot whales, all of which are classified under the family Delphinidae (oceanic dolphins). [6]
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ASCOBANS was negotiated to protect all small whales in the North and Baltic Seas and in the northeast Atlantic. ACCOBAMS protects all whales in the Mediterranean and Black Seas. The global UNEP Convention on Migratory Species currently covers seven toothed whale species or populations on its Appendix I, and 37 species or populations on Appendix II.
The four species of the Balaenidae are found in temperate and polar waters; Eubalaena glacialis (North Atlantic right whale), Eubalaena japonica (North Pacific right whale), Eubalaena australis (southern right whale), and Balaena mysticetus (bowhead whale). Bowhead and right whales can reach up to 18 meters in length and over 100 tons at maturity.
A larger western population of 100–200 appears to be surviving in the Sea of Okhotsk, but very little is known about this population. Thus, the two northern right whale species are the most endangered of all large whales and two of the most endangered animal species in
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Bryde's whale is a species found in all of the world's warm temperate and tropical waters. However, its classification remains ill-defined. In 2021, Balaenoptera ricei was defined as a new species distinct from other Atlantic Bryde's whale populations, and as specific to the Gulf of Mexico. [ 15 ]