74 Aquatic Lite 
kept. They live on mollusks, however, 
however, and a supply of the mud snails 
is necessary for them. With a starfish it 
would not be possible to keep alive an 
oyster, clam, or any other mollusk in the 
jar, and at best the starfishes are not 
long-lived in captivity. 
Probably the most attractive of all 
small fishes is the sea horse; and the gen- 
eral desire to own one is so great that 
horses, tells us that he feeds them on 
Daphnia—the common water flea of the 
ponds—by taking the sea horses out of 
the salt water and the daphnia out of the 
fresh water, and putting them all into 
brackish water one-third salt and two- 
thirds fresh. Within an hour the sea 
horses are replaced in salt water, and this 
process he repeats each day. Fresh- 
water shrimps may be used in the same 
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people even inquire if they could not keep 
one in the same jar with their goldfishes! 
The little creature is difficult to provide 
for except with running sea water and 
salt water Gammarus—the minute 
shrimp that infests the sea-lettuce. Some 
have succeeded in maintaining sea horses 
for a number of months in balanced 
aquaria by feeding them with fresh chop- 
sed prawn on-the end of a stick, which 
the little fish soon grows tame enough to 
take. A New York dealer in aquaria 
and aquarium supplies, who sells sea 
way. During a shortage of Gammarus 
last winter we succeeded in enticing some 
of the sea horses to eat the fresh-water 
worm Tubifex, which will live for half 
an hour in salt water. 
Other fishes, also crabs and prawns, 
annoy the sea horse, but it 1s possible to 
keep anemones, barnacles, oysters and 
clams in the same jar with them. 
The salt water aquarium 
strong light, but should have very little 
direct sunlight—none in the summer, and 
requires 
not over an hour or two a day in winter. 
