American Flagfish (Jordanella floridae)

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American Flagfish

American Flagfish

Jordanella floridae

45 Litres (12 US G.)

5-6 cm (2-2.4")




6.7 - 8.2

18.9-22.2°C (66 -72 °F)

6-20 °d

1:2 M:F

Pellet Foods
Flake Foods
Other (See article)

5-8 years



Additional names

American Flagfish, American Flag Fish, Flagfish, American-Flag Fish

Additional scientific names

Cyprinodon floridae


North America: St. Johns and Ochlocknee River drainages south to peninsular Florida, USA.


The males have red stripes on their bodies and fins. Females are more drab in colour.

Tank compatibility

Flagfish are semi-aggressive and are prone to nip fins. Try to choose tank mates that swim quickly, although a better choice is to keep them in a species tank.


The diet consists of plant matter and algae. If they are fed on a diet of meaty foods, their lifespans will shorten drastically. They eat multiple types of algae, but prefer hair algae.

Feeding regime

Feed often and generously to supplement their high activity level.

Environment Specifics

A well planted tank, preferably in a sunny location, to encourage algae. This is a little fish and can survive many water parameters. However, it would be wise to keep ammonia at 0, nitrite at 0, and nitrate at less than 20 ppm.


A bit aggressive, but it depends on the personality of the fish. They have a tendency to rip off chunks of fins of tank mates.


A short-bodied and thick-set fish with rounded fins. It is attractive in colour with a creamy yellow base colour with alternating horizontal red and green/blue iridescent stripes, this stretches into the dorsal and anal fin. The caudal fin is blue in colour.


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