Dictionary
paddlefish
noun
Any of several primitive fish, of the family , that have a long snout shaped like a paddle.
synonyms
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Exact(58)
Included among the more than 3,000 specimens of nearly 200 species of marine and freshwater fishes are lungfish, blind cave fish, mudskippers, and the primitive paddlefish from the United States.
Individuals born in the late 1980s and early 1990s may survive in the wild because the Yangtze River system has complicated habitats where paddlefish could hide.
Notable among such survivals are the great paddlefish of the Yangtze, the species of small alligator in eastern and central China, and the giant salamander (related to the Japanese giant salamander and the American hellbender) in western China.
The Chinese paddlefish (Psephurus) is more carnivorous and has shorter gill rakers.
Research published in September reported that a three-year search for the giant Chinese paddlefish (Psephurus gladius) failed to sight a single individual while conducting surveys over 300 mi (about 489 km).
The American paddlefish (Polyodon) feeds by straining plankton (mostly tiny, drifting aquatic organisms) through its gill system and has been described as a living plankton net.
In addition, the Chinese paddlefish (Psephurus gladius) has tiny deeply embedded scales all over the body.
The large rivers of China have a rich fish life, among which a species of paddlefish (Psephurus gladius) from the Yangtze River (Chang Jiang) and Huang He (Yellow River) is of interest, as it is one of the two survivors of an otherwise extinct family, the other remnant of which is the paddlefish of North America.
The palate is separated from the cheek elements, and the adductor mandibulae muscle, which closes the jaws, is larger and more subdivided than it is in the Polypteriformes (bichirs) and Acipenseriformes (sturgeons and paddlefish).
Sturgeons are related to the paddlefish and perhaps to the bichir.
Similar(1)
Fossils that are without doubt related to the sturgeons and paddlefishes date back to the Middle Jurassic (about 176 160 million years ago); the earlier history of this order is poorly documented and confused.
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