Cat-eLog Right Arrow Loricariidae Right Arrow Hypostominae Right Arrow Pseudacanthicus

Jump to next section Cat-eLog Data Sheet
Scientific NamePseudacanthicus spinosus  (Castelnau, 1855)
Common NamesL096, Spiny Monster Pleco
L160, Coffee And Cream Cactus Pleco, Gelschwanz Spiny Monster (Germany), Spotted Cactus Pleco
Type LocalityAmazon R., Brazil.
Synonym(s)Hypostomus spinosus castelnau
PronunciationSUE dah KAN thi cuss - spin oh suss
EtymologyPseud- Greek: False, Acanthicus - Greek: Spiny, Thorny. Literally "False Acanthicus" referring to this genus being similar to, yet different from, Acanthicus. This specific epithet refers to its spiny (spinosus=spiny, thorny) appearance.
Jump to next section Species Information
Size 260mm or 10.2" SL. Find near, nearer or same sized spp.
IdentificationThe distinctive light grey colouration can vary to a darker brown especially with age. This fish appears to have a wide distribution and thus colouration and patterning can be expected to vary somewhat.
Jump to next section Habitat Information
DistributionSouth America: Amazon Basin. Reports also exist from the Orinoco Basin, Venezuela.
L096: Pará, Rio do Pará, (Portel)
L160: Pará, Rio Tocantins (Cametá-Marabá), Rio Guamá (Ourém)
Amazon (click on these areas to find other species found there)
Amazon, Lower Amazon, Tocantins, Lower Tocantins, Pará (click on these areas to find other species found there)
Amazon, Lower Amazon, Tocantins (click on these areas to find other species found there)
Show it on a map (Click the map-icon to show/hide map of species distribution)
pH5.8 - 7.8
Temperature25.0-28.0°C or 77-82.4°F (Show species within this range)
Other ParametersCan take cooler water for periods of time. Water current doesn't need to be too strong.
Jump to next section Husbandry Information
FeedingCarnivore although not a predator, prawns and chopped mussel appear favourites and promote favourable growth. Some vegetable should also be provided and thus balances diet.
FurnitureA large stone or preferably wooden hiding place is required, plants are not.
CompatibilityGenerally peaceful but territorial from a young age. Some large specimens are aggressively territorial and may cause problems if housed with other large nocturnal fish.
Suggested TankmatesThe temptation with large tough Loricariids is to keep them with other large tough fish such as Oscars or other brutish characters. This actually works quite well with most omnivorous or mainly vegetarian plecos. Pseudacanthicus despite their defensive protection can be bullied by faster moving fish of similar size. They are carnivores and only eat vegetables when their preferred food is unavailable. The amount of waste produced depends on their diet but is considerably less than a Panaque or Pterygoplichthys of similar size.
BreedingSee Shane's World and CotM articles.
Jump to next section Further Information
ReferencesExped. Amer. Sud.v. 2 - pp45 - Pl. 22 (fig. 3)
Registered Keepers(1) Cory-Diddi, (2) fish fodder, (3) Daniel Machado, (4) stinger, (5) ani-mal-lvr (k: 3), (6) nettaigyo, (7) Chi-Chi (p: 2), (8) tezr, (9) cwhite67, (10) Dave Rinaldo, (11) Haavard Stoere (k: 4), (12) hotchiliz (k: 59), (13) OlePaulsen (k: 3), (14) PseudaSmart (k: 24), (15) brechtvh, (16) jabones (k: 2), (17) playcos, (18) Mruaru, (19) celticfish, (20) Carmine, (21) Chanin09, (22) Amazonka, (23) DOLEMITE (k: 2), (24) nandusnandus (k: 2), who also notes: "Initial attempt to house together in a 48" x 12" aquarium lacking in retreats, resulted in vigorous fighting and quick damage to one of the fish. The wounds healed remarkably quickly. This fish is a vigorous feeder, aggressively taking prepared and frozen meaty food items.", (25) Triactis Trainer, (26) Brad Pleco Addict (k: 2), (27) Turbito75 (k: 4), (28) husky_jim, (29) flatfish, (30) abel (k: 11), (31) rizla75 (p: 2), (32) PlecosAndLoaches, (33) NickFishnut, (34) Phreeflow (p: 2), (35) Junglejason, (36) Mathias, (37) Plecomon, (38) Jozi81, (39) dmfd0331, (40) Calcium, (41) 7Pete, (42) Heriberto.gj, (43) CharlieM9, (44) DHarris, (45) Loc, (46) reardons, (47) Milan.

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Breeding Reports(1) PseudaSmart (b: 52), (2) Turbito75 (b: 31), (3) Mathias (b: 19), (4) OlePaulsen (b: 9).
Article - Shane's World Reproduction Breeding Pseudacanthicus spinosus
Article - CotM 2014 January
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Last Update2014 Oct 12 10:02 (species record created: 2001 May 05 00:00)