TROPICAL AQU ARIUM FISHES 99 



Badis badis spawns on the inside of a small, upright flower-pot, sunk 

 half way in the sand. Remove both parents when young are first observed. 



B16 



PTEROPHYLLUM SCALARE spawn like B5 Group, except that 

 eggs are deposited on glass sides or broad-leaved plants, and they do not 

 bury the yonng, but stick them in different parts of the aquarium for 

 several days. Eggs hatch in 2^ days. Parents should be removed in 

 eight days. To breed these fish requires a well-planted aquarium and 

 plenty of seclusion. Breeders should be well fed up on mosquito larvae, 

 young tropical fishes or freshwater shrimps. They also eat Water- 

 boatmen. Breeding temperature, from 75° to 80°. 



INDEX TO NATURE OR TEMPERAMENT OF FISHES 



Different persons "will have varying experiences zvith the same kinds 

 of fishes under apparently identical conditions. In fact one's ozun obser- 

 vations will sometimes change from year to year. The zvriter, for instance, 

 has heretofore ahvays found that Mexican Sivordtail fishes kill Coral 

 Snails, yet this year they are living together in perfect accord. There- 

 fore zve bespeak the indulgence of those zvhose observations do not agree 

 in all details zvith the statements here published. The data has been 

 gathered from the most experienced experts the zvorld over, and zvhih 

 some minor points may, from time to time, be open to question, the main 

 facts stated are authentic and should form a practical guide for the hand- 

 ling of nearly all knozvn varieties of aquarium fishes. 



Nl GROUP 



Indicates that fish so marked are of a generally peaceful disposition, 

 not disposed to hunt trouble nor to persecute or devour other species 

 kept with them. This data applies mainly to the Barbus group among 

 tropical fishes and the Cyprinoid minnows in the temperate division. 

 However, large fish of any kind take advantage of their size and tyran- 

 nize over their associates more or less and also monopolize the food. So 

 even if a fish is indicated "N. 1." it is as well to keep only such fish 

 as are of approximately the same size together — just as large young fish 

 should be separated from smaller ones of the same species. 



N2 GROUP 



Fish of this class are generally amiable and peaceable and are mainly 

 of the live-bearing Tooth-Carp group. Some of these, again, such as 

 Gambusia affinis and varieties, Pseudoxiphophorus bimaculata. Phnl- 

 loceros caudimaculata and Belonesox belizanus — (this last not a Tooth- 

 Carp) — should only be kept with their own species. Males which "rule 



