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The dorsal fin in hourglass dolphins is variable and the curvature may be particularly pronounced in older animals. The hourglass dolphin has disk-shaped vertebrae and other inclined processes which gives them higher stability. [8] An adult male is about 1.8 meters (5.9 feet) in length and weighs over 90 kilograms (about 200 lbs).
According to a study in 1971, Peale's dolphin and the Cephalorhynchus species are the only dolphins that do not whistle (no acoustic data are available for the hourglass dolphin). Peale's dolphin also shares with several Cephalorhynchus species the possession of a distinct white "armpit" marking behind the pectoral fin.
Hector's dolphin (Cephalorhynchus hectori) is one of four dolphin species belonging to the genus Cephalorhynchus.Hector's dolphin is the only cetacean endemic to New Zealand, and comprises two subspecies: C. h. hectori, the more numerous subspecies, also referred to as South Island Hector's dolphin; and the critically endangered Māui dolphin (C. h. maui), found off the West Coast of the North ...
Māui dolphin, Maui's dolphin, or Popoto (Cephalorhynchus hectori maui) is a subspecies of the Hector's dolphin (Cephalorhynchus hectori)—New Zealand's only endemic cetacean. [3] Māui dolphins are only found off the west coast of New Zealand 's North Island , and are now one of the rarest and smallest dolphin subspecies globally.
New dolphin species discovered along SC coast, study shows. What makes them unique. Eleanor Nash. August 25, 2023 at 9:06 AM. Scientists determined that bottlenose dolphins found close to the ...
The remaining four species in the genus Lagenorhynchus—the Pacific white-sided dolphin, Peale's dolphin, hourglass dolphin and the dusky dolphin—are consistently placed within the Lissodelphininae subfamily, in studies of molecular phylogeny, [8] [4] together with the right whale dolphin and the four species of the genus Cephalorhynchus ...