Redstriped Eartheater

About

Read this page as a warning about a label rather than as a shopping guide, because the name on the tank almost certainly belongs to a different fish. Seriously Fish states it twice over in its Geophagus altifrons profile: 'the majority of Geophagus species in the hobby are sold as G. surinamensis regardless of origin - a situation which continues to cause confusion and exacerbated by the fact that juveniles of most are virtually identical', and, flatly, 'G. surinamensis is in fact almost never traded and very few privately-owned specimens exist.' Wikipedia's genus article says the same in its own words: fish in the aquarium trade 'often are identified as G. surinamensis itself, but they are typically other members of this complex'. The real animal is narrow in every sense. It was described by Bloch in 1791 as Sparus surinamensis and redescribed by Kullander & Nijssen; FishBase gives its distribution as the 'Saramacca and Suriname Rivers in Suriname; Marowijne River in Suriname and French Guiana', and Seriously Fish records that before Kullander's 1986 revision it 'was thought to range throughout the Orinoco, Amazon and Guianas river systems but is now considered endemic to the Rio Surinam and Ri0 Maroni/Marowijne watersheds in eastern Suriname'. It is one of thirteen described members of the G. surinamensis group, which is the group most of the hobby's eartheaters belong to. Size is the practical problem. FishBase's size field gives 17.2 cm SL, while its own biology text still repeats an older figure of 30 cm TL, and the care sites that describe the fish people actually buy put it at 25-30 cm. We gate on 25 cm deliberately: if your shop label is wrong - and the odds say it is - the fish in the bag is more likely a full-sized member of the complex such as G. altifrons, for which Seriously Fish requires a base of 180 x 60 cm to house a group long-term. Everything else about it is the genus in miniature: a peaceful, group-living sand-sifter that takes mouthfuls of substrate and blows them out through the gills, forms pairs, and broods larvae in the mouth. Buy it on locality data, not on the label, keep the forms apart, and do not pass fry on as 'surinamensis' unless somebody has actually identified the parents.

Care

Plan for the fish you may actually have: a group of five or six in at least 180 cm of glass and about 450 L, which is the same room our demon eartheater asks for and close to the 180 x 60 cm base Seriously Fish requires for a group of the related G. altifrons. The care-guide figure of a 55-gallon tank for a pair is not enough for a 25 cm sifter kept in the group it needs. Fine sand is not decoration but feeding equipment - Seriously Fish warns that coarser gravel 'can inhibit feeding, damage gill filaments and even be ingested' - and it advises against leaf litter here, because the sifting stirs partly decomposed material into suspension and into filter impellers. Water quality carries this genus: over-filter, change 50-70 % weekly, never start it in an immature tank, and expect head-and-lateral-line erosion or stunting if you skimp. Warm and around neutral suits it (FishBase gives pH 6.0-8.0, 5-19 dH and 22-25 °C; care sites keep it a few degrees warmer), the flow should be gentle, and mechanical filtration should be tuned to catch the sand it throws up. It is peaceful and does not hunt tankmates, though a spawning pair will clear a space; smaller fish are safe, rooted plants are not - tie Anubias or Java fern to wood and leave the sand open.

Diet

Sand-sifting omnivore with a herbivorous lean in the wild. Fine-grade sinking dry food with some vegetable content, plus small frozen or live bloodworm, Artemia and Tubifex, in three or four small meals a day. Nothing large or floating: the mouth is built for sorting sediment, not for chasing pellets at the surface.

Telling males from females

What works for this species, most reliable first.

• Extended finsStrong · from about 8 months, and later in a suppressed male

  On many cichlids and killifish the male's dorsal and anal fins draw out into trailing points as he matures, while the female's stay rounded.

• VentingA hint only · only on a mature fish, easiest when she is in breeding condition

  The method breeders use when the answer has to be right. Hold the fish upside down in a wet hand or soft net and look at the two openings ahead of the anal fin. The forward one is the anus; the one behind it is what you are reading.

• Adult sizeA hint only · only across animals of the same age

  In many cichlids, catfish and loaches one sex simply grows larger — usually the male, though there are well-known reversals.

Also in these lists

Similar species

Same category and the closest water parameters — if this species isn't quite it, start here.

Sold in Lithuania

These Lithuanian shops listed this species in their public catalogue (checked August 8, 2026). Stock moves — ask before you travel.

These links are unpaid: we get nothing for them and ask for nothing.

Frequently asked questions

What tank size does a Redstriped Eartheater need?

A Redstriped Eartheater needs an aquarium of at least 450 litres (118.9 US gallons) with a footprint at least 180 cm (70.9 in) long — for this species, swimming length matters as much as raw volume.

What water parameters does a Redstriped Eartheater need?

Redstriped Eartheater does best at 22–29 °C (71.6–84.2 °F), pH 6–8 and a general hardness of 3–19 °dGH.

What group size does a Redstriped Eartheater need?

Redstriped Eartheater is a social species — keep a group of at least 5 so natural behaviour emerges and stress stays low.

Is the Redstriped Eartheater suitable for beginners?

Redstriped Eartheater sits in the middle of the difficulty scale — manageable for a careful beginner who has done the reading, but it has specific needs worth researching first.

Sources

• FishBase — Geophagus surinamensis (Bloch, 1791), Redstriped eartheater
• Seriously Fish — Geophagus altifrons (the Notes section that documents the surinamensis label)
• Wikipedia — Geophagus
• Cichlid Room Companion — Geophagus surinamensis
• Fish Laboratory — Geophagus Surinamensis (Red-Striped Eartheater): Ultimate Care Guide
• Gensou Aquascaping — Geophagus Cichlid Care Guide: The Elegant Eartheater