The saying goes that "looks can be deceiving," and it's an accurate expression for the menhaden fish. This little fish plays a powerful role in the undersea world. The menhaden may be near the bottom of the food chain, but it supports many species from popular sport fish all the way up to Atlantic whales. And if the Chesapeake Bay and Atlantic Ocean are where the menhaden call home, this little fish could win the Good Housekeeping Award. That's because the menhaden is a filter-feeder, meaning it cleans impurities in the water. That's crucial to the Chesapeake Bay, where water pollution from farm and sewage runoff is creating increasingly severe problems for the bay and its inhabitants.

But this hard-working little fish is disappearing fast, and its job in the food chain is irreplaceable.

Finding Nemo: What happens to a little fish sucked out of its environment?

The menhaden is not only a small fish, but it's also rather bony - not exactly appetizing for most people. But there is an enormous fishing operation sucking millions of these little fish out of coastal waters every year. In fact, menhaden make up America's second largest fishery. So, if people aren't eating the menhaden, why is this little fish being targeted?

The Omega Protein company vacuums massive quantities - hundreds of thousands of tons - of menhaden through state-of-the-art factory fishing vessels that locate entire schools of these tiny fish. The company then processes menhaden for use as protein supplements and fishmeal.

Ironically, much of Omega's fishmeal is sold to feed livestock or fish farms - uses that harm marine ecosystems and threaten fishing communities. In fact, one of the main uses for Omega's fishmeal is as chicken feed, adding to the high-nutrient wastes already choking many bays and estuaries - including the Chesapeake.  Runoff from chicken farms is also connected to the outbreak of toxic algae in the mid-Atlantic region. Omega fishmeal is also used as food for large-scale fish farms, which privatize the oceans and threaten wild fish stocks and traditional fisheries through pollution and parasitic infestations, among other dangers. Most of the remaining fishmeal goes into pet food. 

Menhaden populations today are at near record lows, and there are reports that some of their predators are starting to go hungry. The time to act is now, before the tiny menhaden is lost forever.