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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.
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]
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
The sea cucumber, like other bioluminescent animals, is able to emit light. It uses this effect as an alarm to expose its self and potential predators in times of an attack.
The pink amperima sea cucumber, nicknamed the “Barbie pig,” is one of the largest invertebrates living on the deep-sea floor. Along with the transparent unicumber, the creature is a type of ...
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.
The sea cucumber ranges in size from 11 to 25 centimeters (4.3 to 9.8 in). [7] Its most distinct feature is its coloring, which is dictated by size: small enypniastes are a bright pink, and larger individuals are a more reddish-brown color. It is also semi-transparent, and its intestine can be seen through its body, especially after feeding. [8]
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 ...