Redhump Eartheater
Geophagus steindachneri
The hilarious and colorful 'Redhump Eartheater' (15 cm). A tireless rooting cichlid. The male is a bizarre masterpiece: shows off a facial mask and a gigantic carmine red frontal fatty hump. Females incubate eggs in the mouth.
Température de l’eau
24 - 28 °C
Valeur du pH
6.5 - 7.5
Type d'eau
Eau douce
Niveau dans le bac
Fond
Taille adulte
15 cm
Volume minimal du bac
>= 180 L
Groupe minimal
>= 1
GH
4 - 12 dGH
KH
2 - 6 dKH
TDS
80 - 240 ppm
Conductivité
125 - 375 uS/cm
Description de l'espèce
Geographical Origin and Habitat: Magdalena and Cauca river basin in Colombia. Inhabits crystal clear mountain rivers with fast and oxygen-rich waters, on beds covered with gravel, smooth sand and round pebbles.
Taxonomy and Morphology: Redhump Eartheater (Geophagus steindachneri). Unique in its genus for its appearance: unlike classic "torpedo" Geophagus, it has a squat body, huge sucker-like lips and a disproportionate fleshy red "hump" on the forehead of dominant males.
Social Behavior: Polymorphic cichlid that lives in a "harem". The dominant male is a tireless despot who patrols the territory and drives away rivals, gathering a group of 3-5 females that he tolerates only if they are ready to reproduce.
Coloration and Sexual Dimorphism: Sand-gray background with golden iridescence; lacks the lateral black spot typical of Geophagus. Dimorphism is drastic: the male is larger and develops a giant bright red bump (nuchal hump), as well as pointed filaments.
Soins, reproduction et cohabitation
Aquarium Setup: Requires a lot of bottom surface area (minimum 120 cm / 48 inches). Fine sand MANDATORY (swallows sharp small stones that kill it). Many woods and smooth rocks to break the line of sight, so that females can escape the male's suffocating attentions.
Diet and Feeding: Sand sifter (Eartheater). Doesn't bite prey, sucks the sand and filters it. Offer small-sized sinking pellets, chopped krill and bloodworms. Also grazes encrusting algae on rocks.
Water Quality: Requires very clean waters and very strong currents. If nitrates exceed 20 ppm or the water is stagnant, the fish loses vitality, the male deflates the hump and they develop hole in the head (HITH).
Compatibility and Cohabitation: Excellent with lively schooling characins (Buenos Aires Tetra, Astyanax) which act as "dither fish" to reassure it. Terrible with aggressive Cichlids or with other Geophagus (which the male will attack incessantly).
Aquarium Breeding: Maternal Mouthbrooder. The male does not participate in care. The female lays on the sand and, comically, the male waves his sperm in her face. The mother will brood the young in her mouth for 3 weeks, starving herself.
Risks and Diseases: Exhaustion of females. If kept in single pairs (1 Male / 1 Female), the male will stress the partner to death by forcing her to spawn endlessly, until she dies of starvation.
Origine et répartition géographiques
Magdalena and Cauca river basin in Colombia. Inhabits crystal clear mountain rivers with fast and oxygen-rich waters, on beds covered with gravel, smooth sand and round pebbles.
Origine
Amérique du Sud hors AmazonieAmérique centrale et Caraïbes
Profil de poisson
- Tempérament
- Semi-aggressive
- It is a mild-mannered cichlid. Unprovoked aggression is very rare. It is a wonderful centerpiece fish.
- Régime alimentaire
- Omnivore
- It is an eartheater. Feed sinking pellets and frozen bloodworms. A fine sand substrate is mandatory.
- Espérance de vie
- 10-15 years
- Taille adulte
- 15 cm
- Ratio des sexes
- Pair
- Keep them in groups. This diffuses natural aggression. Pairs will emerge as they mature.
- Fréquence d'alimentation
- Twice daily
- It constantly sifts the sand. Feed multiple small meals daily. This mimics natural continuous foraging.
- Charge biologique
- Medium to High
- This fish produces a high bioload. Robust biological filtration is essential. Frequent water changes are necessary.
- Courant
- Stagnant
- It originates from riverine environments. It prefers moderate water flow. Provide resting areas with calm water.
- Risque de saut
- Yes
- It is a bottom dweller. It can jump if startled. A secure lid is always recommended.
- Reproduction
- Oviparous
- Many are mouthbrooders. Parents fiercely guard eggs and fry. Breeding pairs form naturally over time.
- Compatibilité et compagnons
- Peaceful
- It is generally peaceful. It fits well in community tanks. It becomes territorial during spawning.
- Niveau dans le bac
- Bottom
- It stays at the bottom. It continuously sifts the sand. A large footprint is required.
Modèles et paramètres scientifiques
FishBase
Fenêtre sur les données scientifiques officielles de l’espèce
FishBase v25.04Données synchronisées le : 15/06/2026
- Niveau trophique
- 2 ± 0 se
- Résilience
- Élevée (moins de 15 mois)
- Singularité phylogénétique (PD50)
- 0.5
- Relation bayésienne longueur-poids
- a = 0.02399, b = 3.03
- VulnérabilitéVulnérabilité faible (10 / 100)
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