-J 



Fig. 236. Lebutes reticulatus (.Incorrectly known as Uirardinus guppyij [Life size] 

 The extraordinary variation in the coloring of the males makes this species a never- 

 ending source of fascination. Xo matter how large the collection, it is practically impos- 

 sible to find two just alike. They are appropriately called the "Rainbow Fish." The 

 female is much larger than the male, and of a dull olive hue. See page 242 (No. 18). 



Fig. 23 7. Gambusia affinis (Average size) 

 Also known as holbrooki, these fishes were the first of the live-bearers to be genci 

 ally introduced into the aquarium in America. They are native to the southeastern 

 Atlantic States and occur as far north as Maryland. Gantbusia affinis has been intro 

 duced in many parts of the world on account of its efficiency in destroying mosquito 

 larvae, thereby controlling malaria and yellow fever. Although hardier than most tropi- 

 cals, this fish cannot withstand freezing temperature. They tear the fins of other fishes 

 The darker specimens are the most sought after. Dark spot? near vent of females are 

 produced by unborn young. Breeding habits, page 242 (No. 18). 



255 



