| Cualac tessellatus img IMG IRF FB IUCN - VU | Cualac | 1 | Mexico HIGH |
| Cyprinodon albivelis img IMG FB IUCN - DD | Cyprinodon | 1 | Mexico LOW |
| Cyprinodon alvarezi img IMG FB IUCN - EW | Cyprinodon | 1 | Mexico HIGH |
| Cyprinodon artifrons FB IUCN - LC | Cyprinodon | 1 | Belize HIGH, Mexico HIGH |
| Cyprinodon atrorus FB IUCN - EN | Cyprinodon | 1 | Mexico HIGH |
| Cyprinodon beltrani img IMG FB IUCN - VU | Cyprinodon | 1 | Mexico HIGH |
| Cyprinodon bifasciatus FB IUCN - EN | Cyprinodon | 1 | Mexico HIGH |
| Cyprinodon bobmilleri FB IUCN - VU | Cyprinodon | 1 | Mexico HIGH |
| Cyprinodon californiensis = macularius img IMG | Cyprinodon | 1 | Mexico LOW |
| Cyprinodon ceciliae FB IUCN - EX | Cyprinodon | 1 | Mexico HIGH |
| Cyprinodon esconditus FB IUCN - VU | Cyprinodon | 1 | Mexico HIGH |
| Cyprinodon eximius FB IUCN - LC | Cyprinodon | 1 | Mexico HIGH, United States HIGH |
| Cyprinodon fontinalis img IMG FB IUCN - EN | Cyprinodon | 1 | Mexico HIGH |
| Cyprinodon higuey FB IUCN - CR | Cyprinodon | 1 | Mexico LOW |
| Cyprinodon inmemoriam FB IUCN - EX | Cyprinodon | 1 | Mexico HIGH |
| Cyprinodon jamaicensis – see riverendi FB IUCN - LC | Cyprinodon | 1 | Mexico LOW |
| Cyprinodon julimes FB IUCN - CR | Cyprinodon | 1 | Mexico HIGH |
| Cyprinodon labiosus FB IUCN - VU | Cyprinodon | 1 | Mexico HIGH |
| Cyprinodon latifasciatus FB IUCN - CR | Cyprinodon | 1 | Mexico HIGH |
| Cyprinodon longidorsalis img IMG FB IUCN - EW | Cyprinodon | 1 | Mexico HIGH |
| Cyprinodon macrolepis img IMG FB IUCN - NT | Cyprinodon | 1 | Mexico HIGH |
| Cyprinodon macularius img IMG FB IUCN - VU | Cyprinodon | 1 | Mexico HIGH, United States HIGH |
| Cyprinodon maya img IMG FB IUCN - VU | Cyprinodon | 1 | Mexico HIGH |
| Cyprinodon meeki FB IUCN - EN | Cyprinodon | 1 | Mexico HIGH |
| Cyprinodon nazas FB IUCN - LC | Cyprinodon | 1 | Mexico HIGH |
| Cyprinodon nichollsi img IMG FB IUCN - LC | Cyprinodon | 1 | Mexico LOW |
| Cyprinodon pachycephalus img IMG FB IUCN - CR | Cyprinodon | 1 | Mexico HIGH |
| Cyprinodon pecosensis img IMG FB IUCN - VU | Cyprinodon | 1 | Mexico HIGH, United States HIGH |
| Cyprinodon pisteri FB IUCN - LC | Cyprinodon | 1 | Mexico HIGH, El Salvador HIGH |
| Cyprinodon salvadori FB IUCN - NT | Cyprinodon | 1 | Mexico HIGH |
| Cyprinodon simus img IMG FB IUCN - NT | Cyprinodon | 1 | Mexico HIGH |
| Cyprinodon sp. Sonora | Cyprinodon | 1 | Mexico LOW |
| Cyprinodon suavium FB IUCN - VU | Cyprinodon | 1 | Mexico HIGH |
| Cyprinodon tularosa img IMG FB IUCN - EN | Cyprinodon | 1 | Mexico HIGH, United States HIGH |
| Cyprinodon variegatus variegatus img IMG FB IUCN - LC | Cyprinodon | 1 | Mexico HIGH, United States HIGH |
| Cyprinodon verecundus FB IUCN - VU | Cyprinodon | 1 | Mexico HIGH |
| Cyprinodon veronicae img IMG FB IUCN - EW | Cyprinodon | 1 | Mexico HIGH |
| Floridichthys barbouri = polyommus img IMG IRF | Floridichthys | 1 | Mexico LOW |
| Floridichthys polyommus img IMG IRF FB IUCN - LC | Floridichthys | 1 | Mexico HIGH |
| Fundulus grandis grandis img IMG FB IUCN - LC | Fundulus | 1 | Mexico HIGH, United States HIGH |
| Fundulus grandissimus FB IUCN - LC | Fundulus | 1 | Mexico HIGH |
| Fundulus herminiamatildae | Fundulus | 1 | Mexico HIGH |
| Fundulus kansae img IMG FB IUCN - LC | Fundulus | 1 | Mexico HIGH, United States HIGH |
| Fundulus lima FB IUCN - EN | Fundulus | 1 | Mexico HIGH, United States HIGH |
| Fundulus parvipinnis FB IUCN - LC | Fundulus | 1 | Mexico HIGH, United States HIGH |
| Fundulus persimilis FB IUCN - EN | Fundulus | 1 | Mexico HIGH |
| Fundulus philpisteri FB IUCN - CR | Fundulus | 1 | Mexico HIGH |
| Fundulus similis img IMG FB IUCN - LC | Fundulus | 1 | Mexico HIGH, United States HIGH |
| Fundulus zebrinus img IMG FB IUCN - LC | Fundulus | 1 | Mexico HIGH, United States HIGH |
| Garmenalla pulchra | Garmenalla | 1 | Belize HIGH, Mexico HIGH |
| Lucania interioris IRF FB IUCN - EN | Lucania | 1 | Mexico HIGH |
| Lucania parva img IMG IRF FB IUCN - LC | Lucania | 1 | Mexico HIGH, United States HIGH |
| Megupsilon aporus img IMG FB IUCN - EX | Megupsilon | 1 | Mexico HIGH |
| Millerichthys robustus IRF FB IUCN - EN | Millerichthys | 1 | Mexico HIGH |
| Profundulus adani | Profundulus | 1 | Mexico HIGH |
| Profundulus balsanus IUCN - VU | Profundulus | 1 | Mexico HIGH |
| Profundulus chimalapensis | Profundulus | 1 | Mexico HIGH |
| Profundulus emilioi FB IUCN - NE | Profundulus | 1 | Mexico HIGH |
| Profundulus hectori FB IUCN - NE | Profundulus | 1 | Mexico HIGH |
| Profundulus mixtlanensis FB IUCN - NT | Profundulus | 1 | Mexico HIGH |
| Profundulus oaxacae FB IUCN - DD | Profundulus | 1 | Mexico HIGH |
| Profundulus parentiae FB IUCN - DD | Profundulus | 1 | Mexico HIGH |
| Profundulus punctatus img IMG FB IUCN - DD | Profundulus | 1 | El Salvador HIGH, Guatemala HIGH, Mexico HIGH |
| Profundulus rei FB IUCN - NE | Profundulus | 1 | Mexico HIGH |
| Rivulus dapazi IRF FB IUCN - DD | Rivulus | 2 | Brazil HIGH, Mexico HIGH |
| Rivulus godmani IRF FB IUCN - NE | Rivulus | 2 | Guatemala HIGH, Mexico HIGH |
| Rivulus mejiai IRF | Rivulus | 2 | Colombia HIGH, Mexico HIGH |
| Rivulus myersi WAK IRF FB IUCN - NE | Rivulus | 2 | Mexico HIGH |
| Rivulus tenuis img IMG IRF FB IUCN - DD | Rivulus | 2 | Belize HIGH, Colombia HIGH, Guatemala HIGH, Honduras HIGH, Mexico HIGH |
| Tlaloc candalarius IUCN - LC | Tlaloc | 1 | Guatemala HIGH, Mexico HIGH |
| Tlaloc hildebrandi FB IUCN - EN | Tlaloc | 1 | Mexico HIGH |
| Tlaloc labialis FB IUCN - LC | Tlaloc | 1 | Guatemala HIGH, Mexico HIGH |
