The Most Important Fish You've Never Heard of

From The Most Important Fish in the Sea by H. Bruce Franklin. Copyright © 2007 by the author. Reproduced by permission of Island Press, Washington, D.C.

First you see the birds -- gulls and terns wheeling overhead, then swooping down to a wide expanse of water dimpled as though by large raindrops and glittering with silver streaks. The sea erupts with frothy splashes, some from the diving birds, others from foot-long fish with deeply forked tails frantically hurling themselves out of the water, only to fall back into their tightly packed school. More and more birds materialize as if from nowhere, and the air rings with their shrill screams. Boats too begin to converge on the scene: the boiling cloud of birds has told anglers everywhere within view that a school of menhaden, perhaps numbering in the tens of thousands, is being ravaged by a school of bluefish.

Attacking from below and behind to slash the menhaden bodies with their powerful jaws, the razor-toothed blues are in a killing frenzy, gorging themselves with the severed backs and bellies of their prey, some killing even when they are too full to eat, some vomiting half-digested pieces so they can kill and eat again. Terns skim gracefully over the surface with their pointed bills down, dipping to pluck bits of flesh and entrails from the bloody swirls. Gulls plummet and flop heavily into the water, where a few splash about and squabble noisily over larger morsels. As some lift with their prizes, the squabbles turn aerial and a piece occasionally falls back into the water, starting a new round of shrieking skirmishes.

Hovering high above the other birds, a male osprey scans for targets beneath the surface, then suddenly folds its gull-shaped wings and power-dives through the aerial tumult, extends its legs and raises its wings high over its head an instant before knifing into the water in a plume of spray, emerges in another plume, and laboriously flaps its four-foot wingspan as it slowly climbs and soars away with a writhing menhaden held headfirst in its talons. Beneath the blues, iridescent weakfish begin to circle, snapping at small lumps sinking from the carnage. Farther below, giant but toothless striped bass gobble tumbling heads and other chunks too big for the mouths of the weakfish. From time to time, bass muscle their way up through the blues, swallow whole menhaden alive, and propel themselves back down with their broom-like tails, leaving telltale swirls on the surface. On the mud below, crabs scuttle to scavenge on leftovers.

The panicked school of menhaden desperately races like a single creature, erratically zigging and zagging, diving and surfacing, pursued relentlessly by fish and birds. Small boats follow the chase, with excited anglers shouting and casting lures that mimic the darting menhaden. Fishing rods are bent double as some of the marauding bluefish and striped bass strike the lures. Bluefish battle until they are finally hooked with gaffs and brought aboard boats, where their blood splatters decks and jubilant anglers.

Then, as suddenly as it began, the wild scene dissipates. The water becomes surprisingly tranquil, disturbed only by wind and wave and the wakes of departing boats. Except for a few gulls lazily circling down and settling on the surface, the birds have disappeared. The menhaden school survives and swims on, its losses dwarfed by plentitude. But a greater danger than predatory fish lurks nearby. The birds have attracted a spotter-plane pilot who works for Omega Protein, a Houston-based corporation that does nothing but catch vast numbers of menhaden and turn their flesh into manufactured products. As the pilot approaches, he sees the school as a neatly defined purplish mass the size of a football field. He radios to a nearby ship, whose 170-foot hull can hold more than a million menhaden. The ship maneuvers close enough to launch two forty-foot-long aluminum boats. The boats share a single purse seine -- a net almost a third of a mile long threaded with lines to close it up like a purse.