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The Chinese paddlefish (Psephurus gladius; simplified Chinese: 白鲟; traditional Chinese: 白鱘; pinyin: báixún: literal translation: "white sturgeon"), also known as the Chinese swordfish, is an extinct species of fish that was formerly native to the Yangtze and Yellow River basins in China.
Parapsephurus is an extinct genus of paddlefish in the family Polyodontidae. Currently the only known species in this genus is the type species, Parapsephurus willybemisi. P. willybemisi is known a nearly complete specimen from the Tanis locality of the Hell Creek Formation in North Dakota, USA, which dates to the late Maastrichtian stage of the Late Cretaceous, approximately 66 million years ago.
Chinese paddlefish: Psephurus gladius: Yangtze and Yellow River basins, China Last recorded in 2003. The construction of the Gezhouba Dam in the middle part of the Yangtze blocked the migration route to spawn in the upper river. It was also heavily fished historically, which depleted the species as it had a long generation time. [133]
The defense mechanisms animals use to evade or fight off predators can be both bizarre and fascinating. Some use camouflage or mimicry, while others have protective armor. Sea cucumbers, however ...
The other is the Chinese paddlefish (Psephurus gladius), which was declared extinct in 2022 following a 2019 recommendation; [6] [7] [8] the species has not been sighted in the Yangtze River Basin in China since 2003. [9] [10] Chinese paddlefish are also commonly referred to as "Chinese swordfish", or "elephant fish". [11]
The paddlefish had likely been suffering for a very long time, a fishing guide said. Fishermen save fish from surprising, painful situation. ‘Probably happy to be caught’
The brown-ringed sea cucumber can reach about 8 inches in length and about 2 inches in width, the study said. It has an “elongated,” tube-shaped body with 20 tentacles and over 70 tube feet.
Genus Polyodon Lacépède, 1797 (American paddlefish) Genus †Psephurus Günther, 1873 (Chinese paddlefish) Family Acipenseridae Bonaparte, 1831 sensu Bemis et al., 1997 (sturgeons) Genus †Boreiosturion Murray et al. 2023; Genus †Protoscaphirhynchus Wilimovsky, 1956; Genus † Engdahlichthys Murray et al. 2020