Cat-eLog Right Arrow Pimelodidae Right Arrow Leiarius

Jump to next section Cat-eLog Data Sheet
Scientific NameLeiarius marmoratus  (Gill, 1870)
Common NamesMarbled Pim
Achara Catfish, Marmor-Prachtantennenwels (Germany), Sailfin Pimeloid
Type LocalityRio Maranon and Rio Napo, Amazon Basin
Synonym(s)Sciades marmoratus
Pronunciationmar mo rat uss
EtymologyThe genus name is derived from Leios, meaning smooth and Arius which is a Greek for "dealing with Mars, warlike, belliose". It's the name of another catfish genus, so the combination is "smooth Arius".  This specific epithet refers to its long (longus=long) barbels (barba=barbel).
Jump to next section Species Information
Size 800mm or 31.5" SL. Find near, nearer or same sized spp.
IdentificationOften confused with the rarely, if ever, encountered Perrunichthys perruno. The fishes are identical in terms of colouration although P. perruno has 8 (1 hard and 7 soft) dorsal fin rays, Leiarius has 10 or 11. Also similar to L. pictus, these two can be distinguished by L. pictus having a larger dorsal fin albeit this feature reduces with age.
General RemarksThere is some history of confusion in the Leiarius genus. L. marmoratus was for some time a synonym of L. longibarbis, but it was taken out of synonymy by Ferraris in his Catalog of Catfishes (2007). Fish are still sometimes seen as L. longibarbis, but most likely they are L. marmoratus.
Jump to next section Habitat Information
DistributionSouth America: Amazon and Orinoco Basins
Amazon (click on these areas to find other species found there)
Orinoco (click on these areas to find other species found there)
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pH5.8 - 7.4
Temperature21.0-25.0°C or 69.8-77°F (Show species within this range)
Other ParametersRequires clean, regularly changed water can become listless and loses appetite if a regular water change regime is not adhered to.
Jump to next section Husbandry Information
FeedingYoung fish will eat virtually anything, especially small tankmates. As the fish matures it should be fed less often and periods of fasting will maintain the fishes health as well as provide the aquarist with a more active pet. Aside from large catfish pellets, feeder fish, crab, prawn and crayfish are also taken. The more adventurous aquarist may also try large earthworms, maggots and small cubes of raw beef heart (taking care to remove all traces of fat).
FurnitureLarge, thick branches or bogwood roots to provide cover over a rounded large pebble base is ideal. Sand is often ''re-arranged'' by larger fish and coarse gravel can irritate or even damage the fish. An open area for night time exercise should also be provided.
CompatibilityPeaceful, although care should be taken to house with appropriately sized tankmates.
Jump to next section Further Information
ReferencesProceedings of the Academy of Natural Sciences of Philadelphia v. 22.
Registered Keepers(1) natefrog, (2) arapaima, (3) Lornek8, (4) KenyanSandBoa, (5) Kjlossman, (6) Freakdaddy, (7) ani-mal-lvr, (8) Argentum, (9) joe.juice13, who also notes: "mine has been extremely fast growing, similar to Red Tail. Active hunter both day and night.", (10) necrocanis, (11) Shovelnose, (12) doesdavid, (13) blurock, who also notes: "19" (3/21/3009)", (14) Fishguy2727, (15) tezr (k: 2), (16) ewurm, (17) Redtailrob, (18) howdenend, who also notes: "This one has a huge appetite, when the food go's in his massive mouth devours 80% before it hits the gravel! Otherwise is a good tankmate with the others, never any sign of fighting.", (19) exoticfish (p: 2), (20) itsbadlands, (21) dannyrawlins, (22) Madding, who also notes: "Fast grower. 4 to 10 inches in a few months. Tankmates: Johanna Pike, American Dat, 4x Bichir, Florida Gar, Black Arowana. None acknowledge the catfishes existence despite it being the biggest fish in the tank.", (23) Viktor Jarikov, who also notes: "still small, 2 1/2"; very pretty", (24) dpk2313, (25) huck34 (p: 3), (26) fleahound, (27) salvador60, (28) TheFishGuy, (29) tijani, (30) shivamotiram, (31) luwi, (32) clarenas, (33) Decker504, (34) arapaimag (k: 4), (35) Duster1971, (36) Marisco1729 (p: 2), (37) luv4bigcats, (38) sequoiacat, who also notes: "MY most skittish catfish, yet is also peaceful", (39) Pcpolo111, (40) miguel mitchel, (41) L-Keeper, (42) richb (k: 2), who also notes: "Traded a $5 angelfish for the last one. Lee's Feed was glad to see the mouth go. These guys are voracious, eat anything. The one in the 360 chases Boulengerochromis if they have part of a frozen thawed smelt hanging out of their mouth. Very aggressive feeders. The larger and more dominant of the two is approaching 20" (March 2014) while the smaller is around 15". They now reside in a 1,000 gallon aquarium.", (43) BMLDN, (44) Nolapete (k: 4), (45) uaru, (46) Altifrons, (47) TheBobbyVee.

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Breeding ReportsNone.
Article - CotM 2015 May
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Last Update2013 Jul 19 09:12 (species record created: 2001 Apr 22 00:00)