Temporal range: Early Cretaceous–Recent 
|Tarpon, Megalops sp.|
The Elopiformes // are the order of ray-finned fish including the tarpons, tenpounders, and ladyfish, as well as a number of extinct types. They have a long fossil record, easily distinguished from other fishes by the presence of an additional set of bones in the throat.
They are related to the order of eels, although the adults superficially resemble very large or giant herrings in appearance. The larvae, however, are leptocephali, looking very similar to those of eels.
Although many fossil forms are known, the order is relatively small today, containing just two genera and nine species:
- Family Elopidae (ladyfish)
- Genus Elops (seven species, one of which was described in 2010)
- Family Megalopidae (tarpons)
- Genus Megalops (two species)
Timeline of genera
- Froese, Rainer, and Daniel Pauly, eds. (2006). "Elopiformes" in FishBase. May 2006 version.
- Mikko's Phylogeny for Elopiformes
- Sepkoski, Jack (2002). "A compendium of fossil marine animal genera". Bulletins of American Paleontology 364: p.560. Retrieved 2011-05-17.
- The inshore grand slam Article about bonefish, ladyfish and tarpon.