Spanish on Fly  By: Terry Gibson   Some species will attack a
fly more readily than any other lure, especially when the water
is calm and clear. And certain feeding styles make it harder to
hook some species than others, especially on fly.  The Spanish
mackerel is one of the most popular nearshore/inshore species in
the Fishing Capital of the World, and a case in point. In such
cases, it pays to know something about the makeup of your
quarry.  This swift, tasty fish feed on things as small as
millimeter-long fry to six-inch sardines. They are what bio-
mechanics specialists call “ram feeders.” If you’ve ever bobbed
for apples, you know that feeding with your mouth only in the
water is hard. Because the density of water is about the same as
that of the prey, the prey tends to be pushed away.  Ram-feeding
predators rush forward, mouths open, to engulf the prey along
with the water surrounding it. The forage item remains fixed in
space, and the predator moves its jaws past the prey to capture
it. The motion of th