It has an most pointy head and a bluish tinge to the body. Gosner and Wilson both have good pics of it. Try Wilson, C.B. 1932. The copepods of the Woods Hole region, Massachusetts., U.S. Govt. Gosner is also useful as a quick reference Gosner, K L. 1979.
Nothing is really good for either meroplankton or mircos.
He does plankton in both offshore and estuarine areas. It has an most pointy head and a bluish tinge to the body. Gosner and Wilson both have good pics of it.