A distinctive and colorful cichlid, the Blue Streak Eartheater or Geophagus argyrostictus is known only from the Rio Xingu and its tributaries in Brazil. In the wild, it inhabits very warm, clear waters in areas with powerful current, usually in relatively shallow water above sandy substrate. Like most fish from the fast-moving Xingu it is a powerful swimmer and will do best when provided plenty of current in the aquarium. Named for the distinctive blue facial markings, this species is more aggressive and territorial than some eartheaters but will generally do well with similar sized tankmates as long as plenty of open swimming space and cover is provided.

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Order : Perciformes Family : Cichlidae. Other species occuring in the Xingu are too numerous to mention but the following are some examples of those that have been collected in the same habitats as G.

Additional furnishings are as much a case of personal taste as anything else but the most favoured set-ups tend to feature relatively dim lighting plus some chunks of driftwood and scattered roots or branches. Rather than a single large meal offer smaller portions daily to allow natural browsing behaviour as this seems to result in the best growth rate and condition. A group of individuals should be the minimum purchase since in smaller groups weaker individuals can become the target of excessive antagonism.

In terms of tankmates other cichlids are generally best avoided although we know of several instances in which this species has been maintained long-term alongside members of the G. Smaller fishes are generally ignored and schools of small characids can be added without fear of predation. Juveniles are impossible to sex accurately by external means unless spawning when the ovipositor of the female is clearly visible. Fully- mature males tend to be a little larger and have longer finnage than females with dominant individuals often developing a pronounced nuchal hump.

Unlike the majority of congeners which practice mouthbrooding this species is a substrate -spawner adopting a fairly basic strategy. A degree of patience is also required since it can be at least a year until they become sexually mature. Courtship is relatively unobtrusive consisting of fin flaring, circling, gaping and head jerking displays, and when ready to spawn a pair will select a suitable site.

Here they dig a large pit which may be defended for some days before a smaller site is selected within it just prior to spawning.

Other fishes are not tolerated in the vicinity of the pit and in smaller aquaria may need to be removed. The spawning surface is normally a solid object within the territory of the pair and is cleaned thoroughly before any eggs are deposited. Spawning occurs in typical style with the female laying one or more rows of eggs before the male moves in to fertilise them, the process being repeated numerous times over a period of an hour or two.

Up to eggs may be deposited and the female stays close to them during the incubation period , tending and defending against intruders, while the male is responsible for defence of the surrounding territory.

After around 3 days 70 hours at Post-hatching both adults normally continue to guard the fry for a period although in some cases the female continues alone. The fry are easily-fed, accepting good quality powdered dry foods, Artemia nauplii , microworm , etc.

This species is relatively rare in the hobby but sometimes available from specialist retailers or private breeders. Though described in it was first collected much earlier and misidentified by Gosse as G. Within this small group G. Later molecular studies by Farias et al. You must be logged in to post a comment. Seriously Fish. This species can be identified by a combination of dark infraorbital stripe Juvenile specimen - locality unknown.

Another young specimen - locality unknown Detail of flank patterning. Lateral view. Classification Order : Perciformes Family : Cichlidae. It is advised to find a filter which has a water flow between times the volume of your aquarium. At a volume of litres, the filter we recommend can be found here. As this is a large aquarium, you may need more than one of these. Other aquarium filters which have been recommended highly by customers in your area can be found here. Click here to find the heater we recommend for an aquarium of this size.

To search for other high quality aquarium heaters in your area, click here. Click on the following links to search for high quality live, frozen and dry food: Bloodworm , Tubifex , Artemia. To find other high quality, highly recommended foods click here.


Human uses

Geophagus is a genus of cichlids that mainly live in South America as far south as Argentina and Uruguay , but a single species, G. Some cichlids previously included in this genus have been reallocated to Biotodoma , Gymnogeophagus or Satanoperca. There are three main groups: [3] [6] [7] [8]. There are currently 31 recognized species in this genus.


Xingu Blue Streak Eartheater (Geophagus argyrostictus)



Geophagus argyrostictus, a new species of cichlid fish from the Rio Xingu, Brazil




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