neshaw

Etymology
or a related word.

Noun

 * 1)  A silver eel.
 * 2) * c. 1960, Joseph Chase Allen, The wheelhouse loafer [selections from Joseph Chase Allen's weekly longshore log, "With the fishermen", from The Vineyard Gazette, 1940-1960],page 280:
 * But when fall comes, the big neshaws want to get to sea and away from here, and that’s when men catch ’em in beach pots and without bait.