It would appear that this disease
is due to extreme cold even more than to an excessive rainfall; for
instance, in many places and more especially in shallows off the coast
of Nauplia, in the Argolid, a number of fishes have been known to be
caught out at sea in seasons of severe cold. The gilthead also suffers
in winter; the acharnas suffers in summer, and loses condition. The
coracine is exceptional among fishes in deriving benefit from drought,
and this is due to the fact that heat and drought are apt to come
together.
Particular places suit particular fishes; some are naturally
fishes of the shore, and some of the deep sea, and some are at home in
one or the other of these regions, and others are common to the two
and are at home in both. Some fishes will thrive in one particular
spot, and in that spot only. As a general rule it may be said that
places abounding in weeds are wholesome; at all events, fishes
caught in such places are exceptionally fat: that is, such fishes a
a habit all sorts of localities as well. The fact is that
weed-eating fishes find abundance of their special food in such
localities, and carnivorous fish find an unusually large number of
smaller fish.
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