The Dickinson press., 1897-07-17
AQUARIUM erRuaoLEs.

AQUARIUM sTRuooLEs.
ways In wAieA Killiss ysa - IAxuse
11shss For Time 1vads P9ssata IS
When live killies are put in an
aquariula tank as food for larger
fishes, they dart OF through the va
ter trying to escape. Most Of them,
however, are soon captured and.
eaten; sometimes all. But some
times a few escape for a time, and
these use every means to avoid CAP
ture. It is q. common thing for the
killie to remain a the surface.
There are fishes that doA like to
take their food there. where they
must gulp in air with it. II nAsk kil-
lie can get actually out Of reach of
the larger fish, it does that-out into
the shallow water on a shelving
stone or under stones, where the
larger fish cannot follow it.
In such tanks as those at the New
York aquarium the killie may. hug
the smooth porcelained side Of the
tank. It is difficult for the larger
fish to take anything from smooth
surface, where it cannot overlap the
object, and a fish is also very shy
about bringing its nose into contact
with the wall. Apparently the Kill
lie knows these things, for it hugs
the wall. And IL one lying by the
wall is taken away from it and put
out in the center Of the tank it
straightway returns to the wall
again.
The killie gets into a corner, where
it is yet more difficult to reach it,
and if there is a jog OF recess in the
corner it gets into that, where to
reach it is more difficult still. Some.
times a killie jumps up on the
strainer. The opening into the over
flow pipe from the tanks is guarded
by a movable globe shaped strainer
of galvanized wire, which is in effect
little round knob projecting from
the back Of the tank. Perhaps a
third or half of the strainer is be-
low the surface of the water.
Sometimes a killie jumps out Of
water upon the strainer and lies
there curved over it, head down on
one side and tail on the other. At
it's highest part the killie is out Of
water distance about equal to its
own length. It is like man jump
ing up on a stoop to escape some
thing dashing along the street.
The strainer is the most difficult
place to reach and the safest place
for the killie when it gets there, but
it couldn't stay there always, for
sooner or later it would die if it re-
manned wholly out Of water. But
wherever the killie may get it is
pretty certain finally to be captured
and eaten. The killie that hugs the
wall or gets into the corners is pur-
sued even there. The trout, for ex-
ample, will come up to a killie that
it cannot take into its mouth and
nose the killie out, and the instant
the killie takes to the open water it
is lost. There it is no match at all
for the vastly superior larger fish.
Sometimes q blackfish will swoop
up and take killie from the edge
Of stone step upon which it is lying
in an aquarium pool, in water SO
shallow that it is stranded. In ma
ture q killie pursued by some larger
fish, blackfish, for instance, might
find shelter under some little arch
in rock, the opening of which was
not big enough for the blackfish to
get it's head into. Then as likely as
not the blackfish would settle down
in front of the arch and wave it's
pectoral fins back and forth, appar-
emily trying to set up current to
drive the killie out.-New York Sun.