noun. A stout-bodied killifish (Fundulus heteroclitus) of coastal Atlantic waters from the Gulf of St. Lawrence to Florida, valued especially as bait.

noun. Any one of several species of small American cyprinodont fishes of the genus Fundulus, and of allied genera; the killifishes; -- called also minnow.

noun. A hardy killifish, Fundulus heteroclitus, found in brackish and coastal waters of the United States and Canada.

noun. silver-and-black killifish of saltwater marshes along the Atlantic coast of the United States

"Atlantic silverside, Atlantic menhaden, mummichog, striped killifish, and winter flounder comprised more than 92 percent of the sample."

killifish  

minnow  mummachog  mummychog