These fish, also known as menhaden on the South Shore, bunker further south and about thirty other names along the Atlantic coast from Nova Scotia to Florida, grow to roughly 15 inches in length and weigh in at about 1 pound. Native Americans in precolonial America called the fish ‘munnawhatteaug,’ which means ‘fertilizer.’

They are a rather oily forage fish with a scale-less head that composes about one-third of it’s body length, are fairly flat-sided with a deeply forked tail. They can range in color from dark blue, green, blue gray, or blue brown above, with silvery sides, belly, and fins, and with a strong yellow or brassy luster. There is a conspicuous dusky spot on each side close behind the gill opening, with a varying number of smaller dark spots farther back, arranged in irregular rows.

They feed in a rather unique manner. An adult pogy swims along with it’s tooth-less mouth wide open and its gills spread. As tiny plankton, annelid worms, and crustacea flow into the mouth they are caught in a whole series of very fine comb-like gill rakers. As they move through the ocean these small fish filter as much as 7 gallons of water per minute! Imagine how much water is filtered when a whole school is feeding.

They have no defense mechanism other than being hidden in a huge school. They are oil-rich so every prey fish in the ocean targets them. Pollock, cod, tuna, stripers, sharks, bluefish and swordfish all savage these schools. Menhaden are a major source of omega-3 fatty acids, which have been shown to cut risks of heart disease and possibly other diseases, such as Alzheimer’s.

Read the full story at the Newburyport Daily News