SECTION VI. 



PARASITES, DISEASES AND ENEMIES. 



There are thorns in the path of the fishculturist, who 

 must be as vigilant as the farmer, manufacturer or mer- 

 chant in order to preserve the fruits of his labor. Out- 

 side of human poachers, he must watch for the three 

 plagues which are treated of in this section. By day 

 and by night there are enemies working against him, as 

 there are against the grower of fruit, grain, live stock 

 or the man in other business. Eternal vigilance is the 

 price of success in fishculture as well as in all other 

 things. 



CHAPTER XXXIV. 



PARASITES. 



All living animals have internal and external para- 

 sites, unless the parasites themselves are exceptions, 

 which may be a matter of doubt, for an old rhyme 

 gays; 



"So naturalists observe, a flea 

 Has smaller fleas that on him prey ; 

 And these have smaller still to bite 'em; 



And so proceed, ad infinitum," 

 250 



