Courtesy of U. S. Bureau of Fisheries 



A YOUNG POTOMAC STURGEON 

 This fish has long rows of bony phites instead of scales 



Courtesy of U. S. Bureau of Fisheries 



A FIVE-FOOT THRESHER SHARK 



This fish has an unusual tail fin 



Courtesy of U. S. Bureau of Fisheries 



A FLYING FISH 



By use of its wings, this fish can soar considerable distances 



through the air 



