Tapajos Red Head Eartheater

About

This one has stopped being an undescribed trade line, which is the first thing worth knowing about it. For three decades it circulated as Geophagus sp. 'Tapajos red head' and under a shelf-full of nicknames, and in 2022 it was formally described as Geophagus pyrocephalus by Chuctaya, Nitschke, Andrade, Wingert and Malabarba in the Journal of Fish Biology. The abstract says why that mattered: 'A new species of Geophagus sensu stricto is described from the Tapajos River basin, Brazil, elevating the number of species of the genus to 21. The new species is of commercial importance and is known in the aquarist trade as Geophagus "red head".' The diagnosis is 'the absence of markings on the head, the bar pattern composed by nine vertical bars on the flanks and the presence of distinct longitudinal bands in the caudal fin', backed by at least 2.0 % divergence in cytochrome b from its closest relatives, and the epithet means fire-head. Seriously Fish has not renamed its profile and still files the fish as Geophagus sp. 'orange head'; Wikipedia's genus article, which lists pyrocephalus among the 33 recognised Geophagus, settles the equivalence in a photo caption - 'Geophagus pyrocephalus also known as Geophagus sp. "orange head" from the Tapajós River'. So a tank labelled 'Geophagus sp. Tapajos' or 'orange head' is this fish under an out-of-date name. Its history in the hobby is short and well documented: Seriously Fish records that it was 'First collected in 1991 by German aquarists Christop Seidel and Rainer Harnoss (Steinhaus, 2010) from the rio Tapajós, eastern Brazil', and is emphatic that despite the trade name 'orange head Araguaia' there is no such fish in the Araguaia or Xingú - 'it is in fact highly endemic and confined to the lower Tapajós', with the most intensely coloured variant coming from the rio Arapiuns. Aquarium Glaser, which imports and breeds it, describes the animal: an orange or red forehead in both sexes from sexual maturity at around 8-10 cm excluding the caudal fin, narrow vertical bars that identify juveniles before the colour arrives, and larvophile mouthbrooding in which the pair spawns on a stone, picks the larvae up after two or three days and shares brood care; because these fish 'live in social groups outside the spawning season', 'it is advisable to keep them in a group, from which pairs will then separate on their own'. Size is where the sources part company, and none of them is obviously right. Aquarium Glaser, which handles the fish commercially, gives a maximum of 16 cm and calls it 'one of the smaller representatives' of the group; AquariumStoreDepot's care guide gives 8 inches (20 cm) with males at 7-8 inches; and Seriously Fish, under the pre-2022 name, gives 200-250 mm standard length. We publish 20 cm - the figure a keeper is most likely to actually meet in a large tank - and leave the disagreement on the page rather than averaging it away. Two further caveats. FishBase's public version has no page for the species at all, so nothing here comes from it. And AquariumStoreDepot's guide, which supplies several of the numbers below, credits the description to 'Deprá, Kullander, Manaças & Faria, 2022' - wrong, and corrected here from the paper itself and from the Cichlid Room Companion. In nature it is doing well: the Cichlid Room Companion, summarising the describing authors, records it as widespread and relatively common through the lower Tapajós, taken both by the ornamental trade and for local subsistence fishing, and present in two protected areas, which those authors suggest would place it at Least Concern - though the IUCN has not evaluated it.

Care

Buy five to eight, not one: Seriously Fish says 'A group of 5-8 individuals should be the minimum purchase', and warns that in smaller numbers 'weaker specimens can become the target of excessive antagonism by dominant individuals or the group may fail to settle and behave nervously'. Seriously Fish's answer for a group long-term is a base of 180 x 60 cm, and we gate on that: 180 cm and 450 L, the same room our demon eartheater asks for. The retail figures - 208 L as a floor, 284-340 L as 'better', 300 L from a planted-tank specialist with 400 L preferred - describe a group of juveniles rather than a group of adults. Deep fine sand is the one non-negotiable: the fish feeds by taking mouthfuls of substrate and sifting them through the gill rakers, and gravel both blocks the behaviour and damages the gill filaments. Warm and soft to neutral - Seriously Fish gives 26-30 °C, pH 4.5-7.5 and 18-179 ppm, the care guides 26-30 °C, pH 5.5-7.5 and 2-12 dGH - with 25-30 % weekly changes and nitrate kept low, because a fish that stirs the bed all day makes work for the filter. Over-filter, keep the flow off the sand surface, and never start this genus in an immature tank. It is one of the gentler cichlids and shares a big tank with medium-sized peaceful species, but it digs constantly, so tie Anubias, Java fern or Bolbitis to wood and rock and leave the sand open; anything rooted in the substrate will be excavated sooner or later. Colour is the last thing to arrive - juveniles are grey and the red head develops over months in a settled group.

Diet

Sand-sifting omnivore. Small sinking granules and fine-grade dry food with some vegetable content, plus frozen or live bloodworm, Artemia and daphnia, fed in several small portions a day. Nothing coarse and nothing that stays 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.

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Frequently asked questions

What tank size does a Tapajos Red Head Eartheater need?

A Tapajos Red Head 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 Tapajos Red Head Eartheater need?

Tapajos Red Head Eartheater does best at 26–30 °C (78.8–86 °F), pH 5–7.5 and a general hardness of 1–12 °dGH.

What group size does a Tapajos Red Head Eartheater need?

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

Is the Tapajos Red Head Eartheater suitable for beginners?

Tapajos Red Head 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

• Chuctaya, Nitschke, Andrade, Wingert & Malabarba (2022), Journal of Fish Biology — A new species of Geophagus (Teleostei: Cichlidae): Naming a cichlid species widely known in the aquarium hobby as 'Geophagus sp. Tapajos red head'
• Seriously Fish — Geophagus sp. 'orange head' (this species under its pre-2022 name)
• Cichlid Room Companion — Geophagus pyrocephalus
• Aquarium Glaser — Geophagus pyrocephalus ( = Tapajós Red Head), 11 December 2024
• AquariumStoreDepot — Red Head Tapajos Care Guide
• Gensou Aquascaping — Geophagus Cichlid Care Guide: The Elegant Eartheater
• Wikipedia — Geophagus