A large mainly freshwater fish related to the sturgeon, with an elongated snout.
匙吻鲟，白鲟
The plankton-feeding Polyodon spathula of the Mississippi basin, and the fish-eating Psephurus gladius of the Yangtze River, the only surviving members of the family Polyodontidae
Example sentencesExamples
Within the Chondrostei, only sturgeons, bichirs and paddlefishes survive today, and many are threatened.
Within bony fishes, non-neopterygians (bichirs, paddlefish, and sturgeons) have relatively smaller brains than those in the vast majority of teleosts.
The tail fin of most ray-finned fish, with the exception of sturgeons and paddlefish, is homocercal, nearly symmetrical about the midline.
Since sturgeons and paddlefish have lost many traits of most bony fish - they lack scales and have a cartilaginous skeleton - their fossil records are very sparse.
American paddlefish are mainly freshwater fish but can survive in brackish water.
Definition of paddlefish in US English:
paddlefish
nounˈpadlˌfiSH
A large mainly freshwater fish related to the sturgeon, with an elongated snout.
匙吻鲟，白鲟
The plankton-feeding Polyodon spathula of the Mississippi basin, and the fish-eating Psephurus gladius of the Yangtze River, the only surviving members of the family Polyodontidae
Example sentencesExamples
Within the Chondrostei, only sturgeons, bichirs and paddlefishes survive today, and many are threatened.
Since sturgeons and paddlefish have lost many traits of most bony fish - they lack scales and have a cartilaginous skeleton - their fossil records are very sparse.
Within bony fishes, non-neopterygians (bichirs, paddlefish, and sturgeons) have relatively smaller brains than those in the vast majority of teleosts.
American paddlefish are mainly freshwater fish but can survive in brackish water.
The tail fin of most ray-finned fish, with the exception of sturgeons and paddlefish, is homocercal, nearly symmetrical about the midline.