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[edit]

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[edit]

Feed often and generously to supplement their high activity level.

Environment specifics[edit]

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.


External links[edit]