G 



U. S. BUREAU OF FISHERIES. 



and mineral content is required. The best prepared foods are those 

 that are gi'anular in form and usually of dark color. Such foods may 

 be purchased at pet stores and contain a mixture of flour, fish roe, 

 meat, etc. Dried bread crumbs are frequently recommended as food 

 for goldfish, especially when whole wheat bread is used. 



Goldiish in an aquarium should be fed every day in summer and 

 every other day in winter. Substitutes for natural food are scalded 

 and dried earthworms, dried liver, fish roe, ant eggs, rice flour, pea 

 flour, etc. Many combinations may be used, the best ones being 



Fig. 5. — Ilomwort { Cerato/jh yllum demersum). Natural size. Found in ponds and slow streams 

 throughout North America, except extreme north. This plant is shallow-rooted, deriving most of its 

 sustenance from the water. 



those containing animal, crustacean, and starchy ingredients, together 

 with some digestible form of lime, such as powdered egg shells, table 

 salt, and Epsom salts. 



A well-known goldfish food consists of 5 ounces of pea flour, 4 ounces 

 of rice flour, 2 ounces of dried and powdered fish flesh (herring), ^ 

 ounce of finely divided dried meat fiber (beef heart) , 2 ounces of dried 

 Daphnia, 1^ ounces of ant eggs (pupse), 1 ounce of dried powdered 

 prawn (shrimp or lobster), 2 raw eggs together with the powdered 

 shells, I ounce of table salt, | ounce of Epsom salts, and sufficient gum 

 arable in boiling water to bind the mass. This is thoroughly kneaded 

 into a thick dough, dried at low temperature, and crushed into con- 

 venient particles, making about a pound of dried food. Just before 



