In fact, there are more than 1 billion colds in the United States every year, according to the National Institutes of Health. And those facts change as scientists learn more about how colds work. Some people swear by zinc as a means of shortening a cold's duration, but research on that subject has been spotty.
The hard clam (Mercenaria mercenaria), also known as a quahog (or quahaug), round clam, or hard-shell (or hard-shelled) clam, is an edible marine bivalve mollusk that is native to the eastern shores of North America and Central America, from Prince Edward Island to the Yucatan YucatÃ¡n. peninsulaonfusingly, the ocean quahog is a different species, Arctica islandica, which, although superficially similar in shape, is in a different family of bivalves: it is rounder than the hard clam, usually has black periostracum, and there is no pallial sinus in the interior of the shell. Contents.
They are excellent for recipes that want to accentuate the clam flavor. The ocean quahog is also known as a mahogany clam, mahogany quahog, black quahog and black clam. The ocean quahog is a slower growing clam that matures in twenty to forty years. Some may live as long as 200 years. Commercially packed clams are generally 40 to 100 years old. The vessels used to harvest these sea clams range in size from about 60 feet to 160 feet in length.The ocean quahogâs primary beds are found twenty to thirty miles offshore in depths from 100 to 240 feet.