94 ZOOLOGICAL SOCIETY BULLETIN 
a 
DWARF GOURAMI 
Photograph by Dr. E. Bade. 
the few fresh-water flying fishes known. It 
will live for several years in captivity in the 
temperature of the living room, and spends its 
time entirely at the surface, never descending 
for the most tempting worm that may drop. 
Special care must be taken to keep a cover over 
the tank containing the butterfly fish, which will 
avail itself of any opportunity to use its wing- 
like pectoral fins and fly out on the floor, where 
it soon dries up. , 
It will sometimes take worm-like strips of 
fresh beef dangled before it, but prefers live 
food, and when meal worms are fed. it will 
take only those that happen to float. In summer 
time flies and other insects can be fed to ad- 
vantage. 
The 
aquaria, the « 
butterfly 
fish has been bred in home 
o 
ges Hoating loosely at the surface. 
mm . 
The young hatch in about a week and require 
minute living organisms like other tropical fishes 
born from eggs—infusoria at first, followed by 
seas SSIS ROME 
CLIMBING PERCH 
Photograph by L. B. Spencer. 
almost invisible crustaceans, and later mosquito 
larvae if procurable, and small worms, such as 
enchytraeans; and finally are able to take meal- 
worms. 
As with other species where the parents do 
not guard the eggs, it is well to remove the par- 
ents or eggs after spawning. 
The large pectoral fins and long rays of the 
ventral fins readily distinguish the butterfly 
fish from all other fishes, the sexes being dis- 
tinguished by the anal fin, rounded in the female, 
notched in the male, and the dorsal fin, pointed 
in the male and rounded in the female. 
CyPRINIDAE 
Fishes with barbels. 
Tue Dantos 
Danio albolineatus 
D. analipunctatus 
D. malabaricus 
D. rerio 
The Danios, from India /and Ceylon, are 
among the most beautiful of tropical toy fishes, 
and not difficult to rear if one can save the non- 
adhesive eggs, which, falling among the roots of 
plants and gravel, are eagerly sought by the 
parents. Some aquarists have succeeded in 
rearing the young by the invention of devices 
for saving the eges, and it has also been found 
that the packing of large, smooth pebbles or 
marbles in the tank, permits the eggs to fall be- 
tween them where the parent fishes cannot 
reach with their busy little snouts. Trays of 
sieve-like design have been used successfully; 
also trays made of strips of smooth, sloping 
glass, which permit the eggs to fall 
through and onto the bottom 
A dense stock- 
wood or 
out of reach. 
ing with plants has also 
proved an egg-saver, the 
eggs, or some of them, find- 
ing protection among the 
roots. 
The young hatch in from 
one to three days and require 
infusoria, baby _ fish-foods, 
rice flour, ete. The adults 
favor white worms, meat. 
fish, chopped shellfish, ete. It 
is necessary to sort the young 
at regular intervals, or they 
will prey upon one another. 
Danios thrive very well in 
the temperature of the ordi- 
nary living room. Specimens 
of D. rerio have lived at the 
Aquarium for three years. 
