Osmeriformes

Alepocephalidae - Slickheads or nakedheads are a family, Alepocephalidae, of osmeriform fishes.

Osmeridae - Smelts – more precisely freshwater smelts or typical smelts to distinguish them from the related Argentinidae, Bathylagidae and Retropinnidae – are a family of small fish, Osmeridae, found in the Atlantic and Pacific Oceans.

Galaxiidae - The Galaxiids are a family of mostly small freshwater fish.

Argentinidae - The herring smelts or argentines are a family, Argentinidae, of osmeriform fishes.

Platytroctidae - The tubeshoulders are a family, the Platytroctidae, of marine osmeriform fishes.

Bathylagidae - The deep-sea smelts are a family, Bathylagidae, of osmeriform fishes.

Opisthoproctidae - Barreleyes, also known as spookfish , are small, unusual-looking deep-sea osmeriform fish comprising the family Opisthoproctidae.

Salangidae - Icefishes or noodlefishes are a family, the Salangidae, of osmeriform fish, related to the smelts.

Lepidogalaxiidae - The species is small, females measuring up to 7 cm in length, its body is slender, elongate and cylindrical.

Microstomatidae - Microstomatidae is a family of osmeriform fishes.

Plecoglossidae - The name "sweetfish" is due to the sweetness of its flesh.

Retropinnidae - Retropinnidae is a family of bony fish that contains the southern hemisphere smelts and graylings.