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American Flagfish (Jordanella floridae) — Cyprinodontidae

American Flagfish

Jordanella floridae
LC · Least Concern
NativeIntroduced

The American Flagfish (Jordanella floridae) is a brackish-water fish of the family Cyprinodontidae that grows up to 6 cm.

Length
6 cm
Water
Brackish
Diet
Omnivore
Behaviour
Small groups
Activity
Diurnal
Body shape
Torpedo-shaped
Substrate
Mixed bottom
Danger
Harmless
Range
Freshwater of Florida and the extreme south-east of the United States.
Edibility
Not eaten

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Description

The American flagfish is a small egg-laying fish of the family Cyprinodontidae, endemic to Florida. The male is brightly coloured with alternating green and red longitudinal rows of spots and a dark side blotch, a pattern reminiscent of a flag; females are duller. The fish grows to only about 6 cm and inhabits vegetated sloughs, ponds, lakes and sluggish streams, and also enters brackish water. It is an omnivore eating worms, crustaceans, insects, algae and plant matter. The male guards the eggs. The species is widely kept as an aquarium fish and is not a seasonal killifish.

Frequently asked questions

How do you recognise the American Flagfish?

The American Flagfish has a torpedo-shaped body, is mainly green and shows a horizontal stripes pattern. Male with a flag-like red-and-green pattern (hence 'flagfish'); the male guards the eggs; popular algae-eating aquarium fish.

Where does the American Flagfish live?

The American Flagfish lives in brackish water and is mostly found around mixed bottom. Freshwater of Florida and the extreme south-east of the United States.

How big does the American Flagfish get?

The American Flagfish grows to a maximum of about 6 cm.

Is the American Flagfish dangerous to humans?

No, the American Flagfish is harmless to humans. None required: this species is harmless to humans.

Is the American Flagfish edible?

The American Flagfish is not usually eaten.

More photos

American Flagfish (Jordanella floridae) — Cyprinodontidae — 2
iNaturalist ((c) Renato Ignacio Guzman, some rights reserved (CC BY-NC))
American Flagfish (Jordanella floridae) — Cyprinodontidae — 3
Wikimedia Commons — Donald Emmerich (Public domain)
American Flagfish (Jordanella floridae) — Cyprinodontidae — 4
iNaturalist ((c) jasonrl, some rights reserved (CC BY-NC))
American Flagfish (Jordanella floridae) — Cyprinodontidae — 5
iNaturalist ((c) geosesarma, some rights reserved (CC BY))

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All data

Identification

English name
American Flagfish verified
Scientific name
Jordanella floridae
Family
Cyprinodontidae
Other names
Flagfish verified

Appearance

Size class
Small verified
Max length (cm)
6 verified
Body shape
Torpedo-shaped sourced
Dominant colour
Green
Pattern
Horizontal stripes
Tail shape
Rounded
Mouth position
Superior (upward)
Lips
Thin
Barbels
No sourced
Dorsal fins
One continuous
Dorsal spines
No sourced

Habitat & distribution

Water type
Brackish sourced
Substrate
Mixed bottom sourced
Natural range
Freshwater of Florida and the extreme south-east of the United States.
Origin
Native sourced

Behaviour & biology

Diet
Omnivore sourced
Diet (detail)
Worms, crustaceans, insects, algae and plant material sourced
Social behaviour
Small groups
Territorial
Yes
Activity
Diurnal
Reproduction
Separate sexes sourced
Sexual dimorphism
Yes
Seasonality
Present year-round in its habitat; no pronounced seasonality known.
Special features
Male with a flag-like red-and-green pattern (hence 'flagfish'); the male guards the eggs; popular algae-eating aquarium fish. sourced

For anglers

Edibility
Not eaten sourced
Fishing method
Not a target species for angling; at most an incidental catch or usable as baitfish.
Regulations source

Safety

Danger to humans
Harmless sourced
First aid
None required: this species is harmless to humans. sourced

Status & sources

Sources
FishBase via GBIF (DwC-A), CC-BY-NC 4.0

More from the family Cyprinodontidae

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