The longnose killifish (''Fundulus similis'') is a marine tropical benthopelagic fish of the genus ''

Fundulus ''Fundulus'' is a genus of ray-finned fishes in the superfamily Funduloidea, family Fundulidae (of which it is the type genus). It belongs to the order of toothcarps (Cyprinodontiformes), and therein the large suborder Cyprinodontoidei. Most o ...

'' and the family ''

Fundulidae Fundulidae is the family of topminnows and North American killifishes. Distribution The 46 species are native to North America as far south as Yucatan, and to the islands of Bermuda and Cuba, occurring in both freshwater and marine environments ...

''. It is endemic to the western Atlantic Ocean, ranging from along the coast of the

Gulf of Mexico The Gulf of Mexico ( es, Golfo de México) is an ocean basin and a marginal sea of the Atlantic Ocean, largely surrounded by the North American continent. It is bounded on the northeast, north and northwest by the Gulf Coast of the United S ...

from the Florida Keys to

Tampico Tampico is a city and port in the southeastern part of the state of Tamaulipas, Mexico. It is located on the north bank of the Pánuco River, about inland from the Gulf of Mexico, and directly north of the state of Veracruz. Tampico is the fifth ...

in Mexico. It can grow up to 12 centimeters in length. The body is rounded, elongate, and olive to silver colored with dark vertical stripes. It can be distinguished from other killifish by its long snout and a dark spot on last vertical bar. This species requires to be allocated a new binomial as Fundulus similis is preoccupied by a junior synonym of Fundulus majalis, the name having been given to a Gulf of Mexico population of that species.

References

{{Taxonbar, from=Q2620234 S Fish of North America Fish of Central America Fish of the Caribbean Fauna of the Southeastern United States Fish described in 1853 Taxa named by Spencer Fullerton Baird