Family Anablepidae
This family regroups the Four-eyes fish species.

Family Aplocheilidae
This family regroups the Panchax and related species.

Family Balitoridae
This family regroups the Sewellia fishes and related species.

Family Cyprinodontidae
This family regroups the Pupfishes and relatives.

Cyprinodon veronicae – Charco Palma pupfish
Jordanella floridae – Florida flagfish

Family Elassomatidae
This family regroups the Pygmy Sunfishes and related species. This family is placed in a separate order.

Elassoma evergladei – Everglades pygmy sunfish
Elassoma okefenokee – Okefenokee pygmy sunfish