Rhabdotus Eartheater

Gymnogeophagus rhabdotus is a small to medium subtropical eartheater from the lower Paraná River, the Laguna dos Patos drainage, and the coastal rivers of Uruguay. Its pearlescent silver body bears a series of dark lateral blotches and a scattering of iridescent scales, producing a subtle but elegant appearance. It is one of the hardier members of its genus.

This species is ideal for the hobbyist wanting an eartheater but lacking space for larger tropical species. It tolerates a wide temperature range and is comfortable in unheated aquaria in temperate climates, needing only a modest setup with fine sand and good filtration. Males display an attractive bluish iridescence on the head during spawning.

Gymnogeophagus rhabdotus is an open substrate spawner. Both parents actively guard eggs and fry, showing excellent parental care. It is one of the easiest eartheaters to breed in captivity and an excellent introduction to substrate-spawning cichlid husbandry.

Water: 16-26°C, pH 6.5-7.8, soft to hard (2-18 dGH); very adaptable — tolerates cooler unheated conditions. Tank: Minimum 120L; fine sand substrate, some rocks and driftwood; pairs require flat stone spawning sites. Feeding: Quality sinking pellets, frozen bloodworm, daphnia, tubifex; accepts most cichlid foods readily. Breeding: Open substrate spawner; biparental care; spawning triggered by temperature rise in spring/summer. Compatibility: Peaceful; excellent with small to medium temperate fish, platies, barbs, and small catfish.