128 THE GOLDFISH AND ITS CULTURE, 
It is advisable also to catch the muskrats in the surround- 
ing neighborhood of the ponds, as they make excursions dur- 
ing the night to the ponds in order to fish. 
This long list of enemies may be increased by adding the 
raccoon, the mink, and water-fowls such as ducks, geese, and 
SWANS. . 
In stores where fish are kept in tanks they must be watched 
and protected from ouse-rats and cats, both of which will 
occasionally make a descent upon the tanks if not prevented. 
