The Inhabitants of the Aquarium 133 



taken from life shows sharply defined black 

 spots scattered all over the fish. While 

 these spots appear in great numbers on some 

 fishes, others are entirely free from them. 



The Bitterling (Rhodeus amarus) is the 

 smallest, but most interesting member of the 



Fig. 63. Bitterling, Rhodeus amarus. 



carp tribe. It is imported from Europe 

 and is a highly desirable acquisition for the 

 aquarium. 



This fish is most remarkable for its pecul- 

 iar propagation. In spring and early sum- 

 mer, the male, usually bluish gray on the 

 back and silvery white on the sides, prepares 



