Paddlefish
Polyodontidae
Summary 2
Paddlefish (family Polyodontidae) are primitive Chondrostean ray-finned fishes. The paddlefish can be distinguished by its large mouth and its elongated, spatula-like snout, called a rostrum, which is longer than the rest of the head. These fish are not closely related to sharks, which are in a different taxonomic class, but they do have some body parts that resemble those of sharks such as their skeletons, primarily composed of cartilage, and their deeply forked heterocercal tail fins....
Sources and Credits
- (c) Joachim S. Müller, some rights reserved (CC BY-NC-SA), http://www.flickr.com/photos/74743437@N00/2511589211
- (c) Wikipedia, some rights reserved (CC BY-SA), http://en.wikipedia.org/wiki/Polyodontidae
