Surinamensis Eartheater

Geophagus surinamensis is a large, impressive eartheater native to the Suriname River and adjacent lower Amazon drainages. Its silver-green body is marked with a prominent dark lateral blotch and overlaid with rows of iridescent blue-green scales that flash brilliantly under aquarium lighting. Males grow substantially larger than females and develop an enhanced fin profile with age.

This species thrives in groups of five or more in spacious aquaria where hierarchical dynamics can be established without excessive aggression. A deep sand substrate is essential to accommodate its constant sifting behaviour. Keep water quality high with efficient filtration and weekly partial changes.

Geophagus surinamensis is an obligate mouthbrooder that incubates eggs in the buccal cavity. Breeding pairs should be provided with flat stones or open sandy areas as spawning sites. Both parents often share mouthbrooding duties during the incubation period.

Water: 24-28°C, pH 6.0-7.2, soft to moderately hard (2-10 dGH); avoid sudden parameter swings. Tank: Minimum 300L with deep fine sand; open midwater swimming space with peripheral driftwood and rocks. Feeding: Sinking cichlid pellets, live and frozen invertebrates, high-quality eartheater-specific granules. Breeding: Mouthbrooder; pairs spawn on substrate; incubation 10-14 days; fry released at free-swimming stage. Compatibility: Semi-aggressive between males; pairs well with large tetras, peaceful cichlids, and catfish.