Mystery baitfish

[Just Fish]

Ok all I have searched and searched and cannot find this baitfish I commonly cast net just south of the fort at St. Marks. Its a small flat silver baitfish, the best way I can describe it is its like a 1/2 dollar with a very tiny yellow Y tail. It resembles a yellowfin menhaden but its almost perfectly round and almost completely flat max 1 1/2 to 2 in diameter. Could it be juvenile menhaden? Anyone else seen this baitfish?

[Redfin]

Menhaden or Threadfin????

[Jumptrout51]

Juvenile pompano.

[CairoTrout]

Pilchards.

[Just Fish]

You may have it CairoTrout, this is the closest picture I can find, however the ones I catch are even more round than these in the picture.
http://www.basspro.com/webapp/wcs/store ... ctID=32301