Cat-eLog Right Arrow Loricariidae Right Arrow Hypostominae Right Arrow Pterygoplichthys

Jump to next section Cat-eLog Data Sheet
Scientific Name Pterygoplichthys scrophus  (Cope, 1874)
Common Names Chocolate Pleco
Alligator Pleco, Rhino Pleco
Type Locality Nauta, Peru.
Synonym(s) Glyptoperichthys scrophus, Liposarcus scrophus
Pronunciation terry gop LICK thees - skro fuss
Etymology Greek, pterygion, diminutive of pteryx = wing, fin + Greek, hoplon = weapon + Greek, ichthys = fish. Masculine form of "scrofa", which means "breeding sow".
Articles
Article - CotM 2011 July
Jump to next section Species Information
Size 275mm or 10.8" SL. Find near, nearer or same sized spp.
Identification Pterygoplichthys can be identified by the number of rays in the dorsal fin. More than 10 indicates that it's a Pterygoplichthys. Most other plecos have 8 or fewer rays (in particular the larger Hypostomus species that are most likely to be confused with Pterygoplichthys).

These plecos have large nostril two horn-like protrusions from their head that are actually nasal flutes or nostril flaps. The also have alligator-like ridges along the sides of their body. Colours range from a rich brown to black to mottled brown.
Sexing Comparison of the genital papilla in mature fish shows the differences in the sexes to the trained eye. In males this is a small yet thick stump which noticeably protrudes from the fish's undercarriage. In females it is less obvious and is recessed or lies flat with the body.
Jump to next section Habitat Information
Distribution South America: Marañon and Ucayali River basins.
Amazon, Upper Amazon, Marañón, Ucayali (click on these areas to find other species found there)
Amazon, Upper Amazon, Marañón (click on these areas to find other species found there)

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pH 6.0 - 7.6
Temperature 22.0-28.0°C or 71.6-82.4°F (Show species within this range)
Jump to next section Husbandry Information
Feeding An adaptible omnivore that will eat a variety of foods, besides being a very good algae eater, supplement diet with sinking pellet foods and algae wafers. Vegetables and freeze dried foods also accepted.
Furniture All but the most robust of plants tend to be eaten or uprooted. Flat stones and bogwood are required to construct caves. Will even eat floating plants. A good pleco for the deeper aquarium.
Compatibility A generally peaceful fish but can be aggressive with other bottom dwellers of similar size/species if not given sufficient room.
Suggested Tankmates Almost any medium sized community fish.
Breeding Unreported.
Breeding Reports There is no breeding report.
Jump to next section Further Information
References Proc. Acad. Nat. Sci. Phila. v. 26 136
International exploration of freshwater No.7, vol.2
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Last Update 2013 Jul 19 00:08 (species record created: 2001 Apr 28 00:00)