Catfish of the Month Right Arrow July 2010


Eel Catfish, Lemmeløs ålemalle (Denmark) - Channallabes apus   (Günther, 1873)

Article © Richard Broadbent, uploaded July 15, 2010.

Richard Broadbent introduces another fine African Catfish of the month - a slippery customer with bags of eel appeal!

The family Clariidae is nowhere near as popular as some other families of catfish, even those from Africa, but this species is a relatively problem free denizen for tanks of 36”and above. It is relatively unfussy as far as water conditions, accepts a wide range of foods, mixes well with other tank mates and has interesting habits.

It is available from time to time at a reasonable price and because of its appearance is not confused with much else: the exceptions being other Channallabes species and Gymnallabes (see CotM July 2005) which are very seldom imported. The difference from Gymnallabes being the absence of pectoral and ventral fins in Channallabes. It is a long slender eel-like species brown or brownish-grey in colour on the dorsal surface, lighter underneath which gets to a foot long.

In the wild this species is found in the Congo river system and eats a lot of small terrestrial insects. Well, so do a lot of other catfish but the unique habit here is that it leaves the water to hunt and feed on land, rather than simply feeding on insects that fall into the water. This is not witnessed in aquaria unless specific set-ups are created with some sort of terrestrial area but one thing to consider is having a completely closed tight fitting lid to prevent this catfish going “walkies” like its larger, better known relatives, Clarias. In captivity it can bury itself in deep sand substrates and appreciates gnarled roots and branches where it can conceal itself. It does not tolerate poor water conditions and can easily succumb to infections brought on by stress — in fact pictures in Seegers and Aqualog show an individual with a dusting of yellow spots which appears to be an infection and is not typical of an individual in good health. A good water change regime along with placid tankmates lead to a trouble free existence. Good tankmates are larger shoaling African tetras and peaceful medium sized African barbs.

It has not yet been bred in aquaria, but egg-filled individuals have been seen, so some dedicated enthusiast may well have some success if they put the effort in with a serious breeding project and find a key spawning trigger. So all-in-all perhaps not everyone's "cup of tea" but nevertheless an interesting and rewarding species.


Copyright information for the images used in this article can be found on the species' full Cat-eLog page.

Down arrow Cat-eLog Data Sheet
Scientific Name Channallabes apus  (Günther, 1873)
Common Names Eel Catfish
Lemmeløs ålemalle (Denmark)
Type Locality Interior of Ambriz, Angola.
Synonym(s) Gymnallabes apus
Pronunciation cha nal ah bez - ah pess
Etymology Channallabes: From the Greek, channe, meaning anchovy and allabes, the name of a Nilotic fish (a kind of lamprey); in reference to the shape of the fish. From the Greek prefix a- meaning without and pous, meaning foot; in reference to the lack of pelvic fins.
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Down arrow Species Information
Size 327mm or 12.9" SL. Find near, nearer or same sized spp.
Identification Distinguished by the extremely elongate body, reduced cranial shield, confluent median fins, small eyes and absence of pelvic fins.
General Remarks Recent research has documented this species' ability to feed terrestially (videos above). The catfish's neck is especially flexible, with specialized vertebrae that allow it to hold its head up out of the water without using fins. The fish's diet provided the scientists with the first clue to its remarkable behaviour - it mainly eats beetles which are found on land. The researchers speculate that a similar feeding strategy could have been used by the first vertebrates to emerge from the oceans.

The fish is known to burrow into the substrate and has been caught by hook and line in waterlogged areas adjacent to rivers and swamps simply by digging a hole and fishing in the resulting pool.
Down arrow Habitat Information
Distribution Africa: Angola to Congo River Basin.
African Waters, Congo (click on these areas to find other species found there)

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IUCN Red List Category Least Concern, range map and more is available on the IUCN species page. Last assessed 2009.
pH 5.8 - 7.0
Temperature 22.0-27.0°C or 71.6-80.6°F (Show species within this range)
Other Parameters Sensitive to bad water; this species appears particularly susceptible to bacterial / parasitic infections.
Down arrow Husbandry Information
Feeding Will take all manner of pelleted food, as well as frozen/live food (the latter being preferred).
Furniture Provide plenty of driftwood for the fish to hide. Ensure that the tank cover is tight-fitting/weighed down, they are capable of climbing out.
Compatibility A peaceful fish that is best suited for the West African biotope tank. Ideal tankmates include mid-sized African barbs, tetras, and cichlids.
Breeding Not reported.
Breeding Reports There is no breeding report.
Down arrow Further Information
Reference Annals and Magazine of Natural History (Series 4) v. 12 (no. 68) (art. 19), pp 142.
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There are 14 registered keepers, view all "my cats" data.
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Last Update 2020 Sep 19 05:14 (species record created: 2010 Jul 15 02:59)

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