Among Fish

A demonstration, for junior science classes, of what fish are, how they live, breathe, swim and, more remarkably, how they float up or down by manipulating their air bladder. The fish shown ... Read allA demonstration, for junior science classes, of what fish are, how they live, breathe, swim and, more remarkably, how they float up or down by manipulating their air bladder. The fish shown in the film are of the kind native to Canada's lakes and streams, but others of the tropic... Read allA demonstration, for junior science classes, of what fish are, how they live, breathe, swim and, more remarkably, how they float up or down by manipulating their air bladder. The fish shown in the film are of the kind native to Canada's lakes and streams, but others of the tropical variety are observed in the miniature marine world of a classroom aquarium.