The Longnose Gar can survive in low oxygenated waters because of a highly vascularized swim bladder.  This swim bladder allows the Longnose to breathe air.  It usually uses both its swim bladder and its gills to breathe.  It surfaces and releases an air bubble to take in another before return underwater.  It supposedly doesn't go to the surface when it gets colder.  But, when oxygen is low it cover its gills and use the bladder only.  This allows for the organism to live outside the water if it is kept wet. 

The Longnose Gar's eggs are poisonous to humans, other mammals, and birds. 

Longnose Gar scales were used by native Americans as arrow heads, ornaments, and tools. 

The Longnose Gar have been around since the time of dinosaurs.