🐟 Paraguay Eartheater — (Gymnogeophagus balzanii)

The Paraguay Eartheater is a peaceful and highly unique South American cichlid, famous for its "earth-eating" feeding style and, in males, the development of a massive nuchal hump during the breeding season. Native to slow-moving rivers, floodplains, and lagoons of the Paraguay, Paraná, and Uruguay River basins, this species is admired for its gentle temperament and fascinating natural behavior.

Rather than aggressively defending a territory like many cichlids, the Paraguay Eartheater spends its time sifting sand through its gills to extract tiny invertebrates and plant matter. Outside of breeding, they are calm, schooling cichlids that do well in peaceful community setups with other non-aggressive fish.

🌊 Tank Setup

• 🏠 Tank Size: Minimum 55 gallons for a small group.
• 🪵 Fine sand substrate is essential to allow natural sifting behavior.
• 🌿 Add driftwood, smooth rocks, and plants (preferably rooted in pots or attached to decor).
• 💡 Moderate lighting, with open swimming areas.

🍽️ Diet

• 🐛 Omnivore — feeds on small invertebrates, detritus, and algae in the wild.
• 🐟 Accepts high-quality pellets, frozen/live bloodworms, daphnia, and brine shrimp.
• 🌱 Supplement with spirulina or vegetable matter for balanced nutrition.
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⚖️ Temperament

• 🤝 Peaceful — can be kept in groups, ideally 5–6 or more to spread out minor disputes.
• 🐠 Great with peaceful tankmates such as tetras, Corydoras, or rainbowfish.
• 👑 Males display a large forehead hump in breeding season, which recedes afterward.

🧠 Behavior & Care

• 🏖 Spends most of its day foraging in the sand.
• 🕊 Non-aggressive except during breeding.
• ❄️ Adapted to cooler tropical conditions — tolerates 68–75°F (20–24°C), making it suitable for unheated tanks in warmer climates.

📋 At a glance

💡 The Paraguay Eartheater is an ideal choice for aquarists seeking a peaceful, sand-sifting cichlid with fascinating breeding displays — including the temporary but spectacular nuchal hump in males.