Product Description
The Polypteridae are a family of ancient, snake-like fishes whose origins date back to the time of the dinosaurs!
All of the present-day Polypterids come from the freshwater rivers and lakes of Africa. They are able to breathe air via a lung-like modification to their swim bladder, and can travel over land using their strong pectoral fins. There are two genera: the genus Erpetoichthys contains only one species - E. calabaricus, known as the Rope Fish or Reed Fish. The other genus contains the Polypterus species (bichirs). Polypterus is a genus of freshwater fish in the bichir family (Polypteridae) of order Polypteriformes. The type species is the Nile bichir (P. bichir). Fish in this genus live in various areas in Africa. Polypterus is the only known vertebrate to have lungs, but no trachea. The etymology of the genus name derives from a combination of the Greek prefix πολυ-, poly- (many) and the root word πτερον, pteron (wing or fin) – "many fins".
In shallow water, Polypterus inhales primarily through its spiracle (blowhole). Exhalation is powered by muscles in the torso. During exhalation, the bony scales in the upper chest become indented. When the muscles are relaxed, the bony scales spring back into position, generating negative pressure within the torso, resulting in a rapid intake of air through the spiracle. The air is nearly sufficient to fill the lungs. This is followed by one cycle of buccal (mouth) pumping, which "tops off" the lungs, with the surplus air from the buccal pumping process discharged through the pharynx. According to one hypothesis, Devonian tetrapods may have inhaled in this way.
Collectible Wildlife Gifts is the market leader in providing high quality, realistic toys of all types! Every one of our items is heavily inspected for quality craftsmanship and authenticity. Our products make great gifts for your family and friends! Additionally, our lifelike animal figurines and plush make for great displays and educational sets. We are happy to serve our wide range of clientele from parents to educators, gift shop owners and many more!
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From plush sharks to educational animal growths cycle we offer the perfect toy or gift for any occasion. Our products have been ordered by educational groups, aquariums, zoos, and more.
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