Neoteleostei

The remaining members of Neoteleostei are marine: The populous clade of the Acanthopterygii which consist of the Beryciformes, Holocentridae and the aforementioned Percomorpha (which include families such as the tuna, seahorses, gobies, cichlids, flatfish, wrasse, perches, anglerfish, pufferfish), the Ateleopodidae (jellynoses), the Lampriformes (oarfish, opah, ribbonfish), the Zeiformes (dories), the Polymixiiformes (beardfish), the Stylephorus, the Myctophiformes (lanternfish), and the Aulopiformes (lizardfish) which include some brackwater species (also the marine order Stomiiformes was once included in the Neoteleostei as part of the superorder Stenopterygii, but have since been placed in Stomiati outside the Neoteleostei).

The swim bladder, when present, is physoclistous, a trait also shared with the non-neoteleostei orders Argentiniformes and Stomiiformes.

Neoteleostei have also lost the enzymes NOS2 and NOS3, the latter a trait they share with the rest of the Clupeocephala and possibly the Latimeria (NOS2 and NOS3 have also yet to be detected in Elopomorpha).