76 GOLDFISH VARIETIES AND 
Tue Rainzow Darter Esteoma coerulea is probably the most bril- 
liantly colored of our native fishes, being barred with red, blue, orange and 
green in most striking fashion. On account of its brilliant coloring it is 
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Fic. 58. Tue Darter (Enlarged nearly twice) 
known as the Soldier Fish. It occurs in shallow streams of the Middle 
West. Extremely fond of daphnia or very small worms, but may be- 
come educated to taking shreds of raw meat. They can be kept success- 
fully and are well worth the trouble. 
THE KILLIFISH 
Killifish, both fresh and saltwater forms are among the most hardy 
of the smaller fishes. Used largely as bait-fish on account of their 
tenacity of life, they exhibit the same quality in the aquarium, standing 
Fic. 59. THe KiLlirisH or BULLHEAD MINNOW (Enlarged one-half) 
very bad treatment before succumbing. The barred sides and fleeting 
irridescent colors are most attractive, particularly in the saltwater form 
of Fundulus diaphanus. They will eat anything and are harmless to 
other aquarium fishes. Boys usually know this fish in streams as the 
“bull-head” minnow, while the popular name on the New Jersey coast 
for the saltwater form is “Mummychug.” Size 3 to 4 inches. 
