In North Carolina, members of the family Clupeidae include the herrings, shad, and menhaden. Although members of this family can be found year round, we wanted to specifically mention them today due to the annual spring spawning runs that a few of these species make. Starting in about February, and running through May, the sexually mature (and normally marine) Hickory Shad, American Shad, Blueback Herring, and Alewife Herring will enter area rivers and swim up them to reach their spawning grounds. It is during this time that anglers will commonly encounter them, and with any luck, catch them.
Identification of the various Clupeiform fishes becomes vitally important during their spawning runs, as different rules apply to different species, in different waterbodies. At the time of writing, in North Carolina, on the Neuse River, you can keep 10 shad (American or Hickory) in combination, including no more than 1 American shad. For more information, see:
The aim of this post is to help in identifying the American Shad from the Hickory Shad, as these are the two that we receive the most questions about, and the two most commonly caught on hook and line. If you wish to learn about the other river herrings, please see this pamphlet by the NCWRC:
American Shad Identification:
The American Shad, Alosa sapidissima, is the largest of all the clupeids. Commonly reaching sizes of 50 cm SL (19.6 inches, Standard Length). Like all shad in this article, they have a silvery, metallic sheen, with blues and greens on top, fading to white below. They also have a row of scales on their bellies, known as ventral scutes. These scales are saw-like, very noticeable, and serve as a method to distinguish the river herring and shads from the sea herrings, which lack these scales. One of the most obvious features to aid in identifying them, is the lower jaw. The lower jaw of the American Shad does not protrude beyond the upper jaw when fully closed. This will become a lot more obvious in the following sections. The American Shad has 59-73 gill rakers on the lower limb of the first gill arch.
Hickory Shad Identification:
Hickory Shad are noticeably smaller on average than the American Shad. Commonly to 40 cm SL (15.7 Inches Standard Length). Hickory Shad also have ventral scutes as in the above photograph. The lower jaw of the Hickory Shad protrudes beyond the upper jaw when fully closed. The Hickory Shad has approximately 20 gill rakers on the lower limb of the first gill arch.
Closed Jaws up close:
Here, in this photo above, you can see the lower jaw of the Hickory Shad protrudes a great deal past the upper jaw when the mouth is closed.
Here, in the photo above, you can see the lower jaw of the American Shad does not protrude beyond the upper jaw when the mouth is fully closed. The mouth is in fact open just a bit in this photograph.
Some of the other more common Clupeids in our area include the Gizzard Shad, Dorosoma cepedianum, the Atlantic Menhaden, Brevoortia tyrannus, the Atlantic Thread Herring, Opisthonema oglinum, and the Threadfin Shad, Dorosoma petenense.
We will be adding additional photographs as we encounter them!