We get two varieties of shad in the salt---American shad and hickory shad. The shad you hear the FW bassn' guys talk about on TV are either threadfin shad or gizzard shad.
Hickory shad can be a blast to catch on light tackle--they'll hit small metal lures, and put on an aerial display. Some people refer to them as poor man's tarpon
Menhaden, bunker, mossbunker, pogies et al are all popular names for the fish known scientifically as
Tyrannus Brevooris