An aquarium is set up, stocked with snails, goldfish and tadpoles, and maintained in a classroom. All fish need oxygen and their method of breathing under water is explained as is the difference between lungs and gills. From tadpole to frog. ” B W 1950 Educational film about aquatic life, centering around some school children who set up an aquarium in their classroom. 00:29:20:00 B W 1950 ms Teacher at blackboard with words “”tadpole”" and “”frog”" and pictures of same. 00:31:58:00 B W 1950 ms, cu Goldfish in an aquarium, many shots ECU goldfish breathing. 00:35:16:00 B W 1950 cu Tadpoles in an aquarium. 00:36:30:00 B W 1950 ecu Aquatic snail crawling around underwater, several shots. 00:38:12:00 B W 1950 ecu Fish opening and closing its mouth, good shot”",,02/15/09 02:30 PM,”1950s