GENERAL CARE 327 



newly imported goldfishes. It is caused by animal para- 

 sites, the presence of which is shown by dark patches on 

 various parts of the victim, covering open sores. Treat- 

 ment is almost hopeless, and if solutions of salt, potassium 

 permanganate or other germicides are of no avail, it is best 

 to destroy the fish and overhaul the aquarium. 



There are a great many animal parasites which are de- 

 structive to fishes, the worst being an infusorian known as 

 Ichthyopthirius. The first indication of the presence of this 

 parasite is the appearance of small, round, whitish spots 

 which gradually spread to other parts of the fish's body. 

 The victim becomes greatly emaciated and dies within a 

 few days. Many methods, such as the usual immersions, 

 heating of the water to 90° Fahrenheit, etc., have been tried 

 to little purpose, and very few cures are effected. 



It is pertinent to note at this point that when fishes must 

 be removed from the tank, they should always be caught in a 

 net of coarse cloth. They should never be lifted in metal 

 strainers, or in the hand, as it is almost impossible to 

 avoid injury, slight though it may be. Carelessness in this 

 respect is often the primary cause of serious loss. 



It is important, also, that the temperature of the water in 

 which a fish is to be placed be the same as that from which 

 it came. This is an important point, especially with deli- 

 cate species, and lack of observance may cause severe losses. 



After all is said and done, the tyro's safest course is to 

 keep the aquarium clean and take every possible precaution 

 against the introduction of disease. A sick fish is a diffi- 

 cult subject, and a fresh start is usually the only means of 

 relief. 



