Glimpses of Ocean Life; Or, Rock-Pools and the Lessons they Teach — John Shaqi
Glimpses of Ocean Life; Or, Rock-Pools and the Lessons they TeachHarper, John
Science
Glimpses of Ocean Life; Or, Rock-Pools and the Lessons they Teach
Harper, John
Animal behavior; Marine animals -- Juvenile literature
Like many other writers, I have seen scores of this species of Actiniæ
that contained the remains of crabs of large dimensions, but at one
time considered that the latter were dead specimens, which had been
drifted by the tide within reach of the Actiniæ, and afterwards
consumed. That such, indeed, was the correct explanation in many
instances I can scarcely doubt, from the disproportionate bigness of
the crabs as compared with the anemones, but feel quite confident, that
in other instances, the crustacea were alive when first caught by their
voracious companions.
To test the power of the 'crass.,' I have frequently chosen a specimen
well situated for observation, and dropped a crab upon its tentacula.
Instantly the intruding animal was grasped (perhaps merely by a claw),
but in spite of its struggles to escape, was slowly drawn into the
mouth of its captor, and eventually consumed. In one case, after the
crab had been lost to view for the space of three minutes only, I drew
it out of the Actinia, but although not quite dead, it evidently did
not seem likely to survive for any length of time.
In collecting Actiniæ great care should be taken in detaching them from
their position. If possible, it is far the better plan not to disturb
them, but to transport them to the aquarium on the piece of rock or
other substance to which they may happen to be affixed. This can in
general be done by a smart blow of the chisel and hammer.
Should the attempt fail, an endeavour should be made to insinuate the
finger nails under the base, and so detach each specimen uninjured.
This operation is a delicate one, requiring practice, much patience,
and no little skill. We are told by some authors that a slight rent
is of no consequence, since the anemone is represented as having the
power of darning it up. It may be so, but for my part I am inclined in
other instances to consider the statement more facetious than truthful.
In making this remark, I allude solely to the disc of the animal, an
injury to which I have never seen repaired. On the other hand, it is
well known that certain other parts may be destroyed with impunity. If
the tentacula, for instance, be cut away, so great are the reproductive
powers of the Actiniæ, that in a comparatively short space of time the
mutilated members will begin to bud anew.
'If cut transversely through the middle, the lower portion of the
body will after a time produce more tentacula, pretty near as they
were before the operation, while the upper portion swallows food as
if nothing had happened, permitting it indeed at first to come out at
the opposite end; just as if a man's head being cut off would let out
at the neck the bit taken in at the mouth, but which it soon learns to
retain and digest in a proper manner.'
Public-domain text, read in full here on John Shaqi.
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