American Flagfish

American Flagfish (Jordanella floridae) is a colorful and hardy native North American fish known for its distinctive red, white, and blue pattern that resembles the stars and stripes of the American flag. Males display the brightest coloration, featuring shimmering blue-green scales with red accents and small light spots scattered across the body. Females are typically more subdued in color but still attractive and slightly rounder in shape.

This species is native to slow-moving waters in Florida and surrounding regions, where it inhabits heavily vegetated ponds, canals, and streams. In aquariums, American Flagfish are appreciated not only for their striking appearance but also for their helpful habit of grazing on algae, including hair algae.

American Flagfish are generally hardy and adaptable, making them suitable for many freshwater aquariums. They can be semi-territorial, particularly males during breeding, so providing plants, driftwood, and hiding spaces helps create natural boundaries. They do well in planted aquariums and can be kept with other moderately sized, peaceful fish.

Quick Care Overview

• Temperament: Semi-peaceful; may be territorial

• Size: ~2–2.5 inches

• Tank Size: 20 gallons or larger

• Water: Neutral to slightly alkaline freshwater

• Diet: Omnivore – algae, flakes, pellets, frozen foods, and live foods

With their patriotic coloration and algae-eating habits, American Flagfish are both practical and visually striking additions to freshwater aquariums.