When red mullet are abundant in fishmongers' shops, a fine mackerel
season may be expected. The early mackerel are frequently attended by
a few mullet; and whenever they nearly, if not altogether, equal the
mackerel in number, the circumstance is generally the presage of the
approach of great shoals of mackerel.
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The course of herrings and mackerel is traced by their eggs, which,
during a calm, may be seen floating on the surface of the water, like
saw-dust, amidst an appearance like the wake or track of a vessel.
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