Dark-edged splitfin

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Dark-edged splitfin
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cyprinodontiformes
Family: Goodeidae
Genus: Girardinichthys
Species: G. multiradiatus
Binomial name
Girardinichthys multiradiatus
(Meek, 1904)

The dark-edged splitfin (Girardinichthys multiradiatus) is a species of fish in the family Goodeidae endemic to Mexico.[1] It is a live-bearing, cold-water fish from the mountains of Mexico. The species is incredibly temperature sensitive. If water is too cold, all offspring turn out to be male. If water is too hot, females will birth their first brood of only 1–3 fry and then die shortly thereafter, which makes it very difficult to maintain a colony. It is also a primarily herbivorous species and requires a great deal of vegetable matter in its diet.

G. multiradiatus females reach about 3 in and males 2.5 in in length. The species is commonly called the "golden sailfin goodeid" due to their extended fins, especially the males.