noun, plural (especially collectively) sail·fish, (especially referring to two or more kinds or species) sail·fish·es.
Examples from the Web for sailfish
And the obvious reason is that nobody seems to take the trouble to get what might be proper bait for sailfish.
Sailfish would jump around us for a while and then they would stop.
I never liked it, but with the sailfish I at least was not nervous about him attacking the boat.
But the proportion held about the same, although I consider that fishing for a sailfish and catching one is a great gain in point.
We stowed him up in the bow and got under way again, and scarcely had I let my bait far enough astern when a sailfish hit it.