Megalechis thoracata • Callichthyidae • Cat-eLog

Close-up of head
Ventral view (female)
Male
Male with offspring
Male during spawning
Pair during spawing
Bubble nest
Juvenile
Bubble nest
Four weeks old
Six weeks old
Nine weeks old
Albino
10 mm
5 cm
Albino

Cat-eLog Data Sheet
Scientific Name	**Megalechis thoracata** (Valenciennes, 1840)
Common Names	Hoplo Armoured Catfish, Gefleckter Schwielenwels (Germany), Plettet Amazon-pansermalle (Denmark), Prickig Hoplo (Sweden), Spotted Hoplo
Type Locality	Mana River, French Guiana.
Synonym(s)	Callichthys exaratus, Callichthys personatus, Hoplosternum personatus, Hoplosternum thoracatum surinamensis, Megalechis personata
Pronunciation	MEG ah LEK iss - tho rah KAT ah
Etymology	Megalechis: From the Greek megas, meaning large and lekis, meaning plate; in allusion to the extreme development of the coracoid bones on the breast of fully developed males.
Articles	- CotM 1997 August
Species Information
Size	124mm or 4.9" SL. Find near, nearer or same sized spp.
Identification	Can be distinguished from the similar M. picta by the absence of a conspicuous dark vertical band in the caudal fin. In M . thoracata the caudal fin is all-over greyish.
Sexing	A sexually mature male exhibits a thickened first pectoral ray which ranges from orange / brown to scarlet in colour.
Habitat Information
Distribution	South America: Amazon, Orinoco and upper Paraguay River basins, as well as coastal rivers of the Guianas and northern Brazil. Amazon (click on these areas to find other species found there) Orinoco (click on these areas to find other species found there) La Plata, Paraná, Paraguay, Upper Paraguay (click on these areas to find other species found there) Guyana Waters, Coastal Rivers of Guyanas (click on these areas to find other species found there) Trinidad rivers (click on these areas to find other species found there) Maranhão waters, Itapicurú (Maranhão) (click on these areas to find other species found there) Log in to view data on a map.
IUCN Red List Category	Not Evaluated
pH	5.5 - 8.2
Temperature	17.0-28.0°C or 62.6-82.4°F (Show species within this range)
Other Parameters	Able to survive in poor water conditions.
Husbandry Information
Feeding	Not a fussy eater, most foods are accepted. Bloodworm and sinking catfish tablets are best, but once established will eat flakes at the surface. Larger fish will take cichlid tablets / doromin.
Furniture	Megalechis can be found in South American low-oxygen plant infested pools, almost puddles in some cases, but will happily live in most set-ups.
Compatibility	Peaceful and not predatory, although larger specimens can be downright boisterous at feeding time.
Breeding	Well conditioned pairs should spawn readily, but a large water change should prompt spawning of a more reluctant pair. Mature fish are typically 18 months to 2 years old. The male builds a large bubble nest, therefore surface movement from filtration should be kept to a minimum. A mass of floating plants (Wysteria is good) are necessary to anchor the nest. After spawning the male guards the nest. The eggs within should hatch after 4 days. The fry are free swimming after 2 days and should be fed newly hatched brine shrimp. They will grown rapidly and should be fed small amounts frequently for the first 6 - 8 weeks during which they can attain sizes of up to 1.5''.
Breeding Reports	There are 3 breeding reports, read them all here.
Further Information
Reference	Histoire naturelle des poissons v. 15, pp309, Pl. 443.
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Last Update	2020 Oct 25 01:04 (species record created: 2001 Apr 21 00:00)