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Paddlefish About Paddlefish : Paddlefish scientifically known as Polyodontidae are ancient Chondrostean ray-finned fishes. There are only two existing species of these fish: the Chinese and the American paddlefish. Spoonfish, spoonbill cat, and Polyodon spathula are amongst numerous names given to this exceptional primitive fish. The paddlefish is the biggest (over 300 pounds, seven-feet long) freshwater fish in the United States and is found in 25 states that have big streams and impoundment within the Mississippi River basin.

Physical characteristics : Early investigators thought that paddlefish uses their snouts to dig vegetation from the base of lakes and rivers. In fact, they nourish by filtering out zooplankton from the bottom water, with the help of filaments located on their gill arches called gill rakers. The paddlefish can be renowned by its big mouth and it's stretched out snout called a rostrum. This spatula like snout is bigger than the rest of the head. The paddlefish's rostrum contains receptors that can sense fragile electrical fields, signifying that they use their rostrum as an antenna to sense zooplankton.

Breeding : Paddlefish spawn their eggs in midstream over uncovered rocks or gravel. The eggs are like glue and get attach to the rocky substrate. The juvenile are swept downstream after hatching and develop to maturity level in deep freshwater rivers.

Paddlefish Caviar : In the last century, paddlefish and sturgeon have been commercially oppressed for their eggs, called caviar. Paddlefish and sturgeon are two of the most significant fish for freshwater caviar. Paddlefish take several years before they are able to lay eggs. A female may take nine to eleven years, when they are about 43 inches long, and males eight years old and 41 inches long are able to spawn. The female release sticky eggs haphazardly over the water base and dump them.

Paddlefish Habitat : The paddlefish is inhabitant to the Neches, and Trinity River systems of Texas and traditionally supported commercial and frivolous fisheries in the state. Habitat modifications, particularly building of dams that obstruct spawning migrations, and over reaping have resulted in a decline in paddlefish

Chinese Paddlefish : Chinese Paddlefish is scientifically known as Psephurus gladius. It is also known as Chinese Swordfish, and they are considered as the largest freshwater fish. It is one of two existing paddlefish species, the other being the American Paddlefish. It is also known as elephant fish because its snout is similar to an elephant trunk. It is also referred as Giant Panda of the Rivers, not because of any bodily similarity to a panda, but because of its scarcity and confined status.

American Paddlefish : The American paddlefish is scientifically known as Polyodon spathula. They are also called as the Mississippi paddlefish or spoonbill. A paddlefish lives in slow-flowing waters of the Mississippi River. They are intimately associated to the sturgeons. This huge Chondrostian freshwater fish may grow up to 230 cm and weight up to 120 kg. The paddlefish takes its universal and scientific names from its unique snout, which is greatly extended and compressed into a paddle shape. The American paddlefish is believed to use responsive electroreceptor on its paddle to spot its prey, as well as to steer while moving to spawning sites. The American paddlefish nourish themselves largely on zooplankton but also eats crustaceans and