Cat-eLog Right Loricariidae Right Hypostominae Right Hypancistrus  |  | 

Down Cat-eLog Data Sheet
Scientific Name Hypancistrus contradens  Armbruster, Lujan & Taphorn, 2007
Common Names Orinoco Polka-dot Pleco
Colombiansk Sneboldsugemalle (Denmark)
Type Locality Río Ventuari, 23 kilometers northeast of Macuruco, 94 kilometers east of San Fernando de Atabapo, 4°04'50''N, 66°51'31''W, Amazonus, Venezuela
Pronunciation hype an siss truss - kon tra dens
Etymology A contraction of the Greek hypo (meaning less than) and ancistrus, an allusion to the reduced number of teeth (particularly in the lower jaw) found in this genus. From the Latin contra for opposite, or of difference, and dens for tooth, in reference to the differently shaped teeth in the dentary and premaxilla.
Down Species Information
Size 126mm or 5" SL. Find near, nearer or same sized spp.
Identification Often confused because of the picture in Aqualog and originally thought to be Hypancistrus inspector - Hypancistrus contradens lacks the black edging seen in the unpaired fins of Hypancistrus inspector.

Most easily confused with L201 which is flatter, more finely spotted and is more slender and less high bodied than Hypancistrus contradens which also grows about 2cm longer.
Sexing Mature males develop teeth like odontodes on their leading pectoral fin rays. These are more noticeable seasonally - presumably they are enlarged during the reproductive season.
General Remarks Aqualog shows an out-of-water L270 (or possibly L129) either way it's not this fish.
Down Habitat Information
Distribution South America: Rio Orinoco in Venezuela.
Orinoco, Upper Orinoco, Ventuari (click on these areas to find other species found there)
Orinoco, Upper Orinoco (click on these areas to find other species found there)
Amazon, Middle Amazon (Solimoes), Negro, Upper Negro (click on these areas to find other species found there)

Log in to view data on a map.
IUCN Red List Category Near Threatened, range map and more is available on the IUCN species page. Last assessed 2019.
pH 5.0 - 7.5
Temperature 25.0-29.0°C or 77-84.2°F (Show species within this range)
Down Husbandry Information
Feeding Unlike the popular opinion of many other loricariids, Hypancistrus are more carnivores than algae eaters. This is backed up by a small and lightly toothed mouth that indicates they are poor algae scrapers. Provide small and frequent supply of mainly meaty foods such as dry discus food, bloodworm and even brineshrimp with the infrequent offering of flake or algae tablets. User data.
Furniture Sand, primarily rocks and optionally driftwood. Caves made out of slate plates, bamboo or PVC pipe.
Compatibility Suitable with most fish, as long as they are not too large or territorial about bottom-space.
Suggested Tankmates Small tetras and other similar small fish. Also Corydoras. Care has to be taken to ensure that they get enough food, as they can be a bit shy and slow to grab food when available.
Breeding Breeds in a cave in typical Hypancistrus manner. Cave around 2.5cm/1"-5cm/2" diameter/diagonal and around 15cm/6" deep. Male cares for the brood for approximately 14 days. The clutch is around 20-50 eggs, depending on the size and condition of the female.
Breeding Reports There are 16 breeding reports, read them all here.
Down Further Information
Reference Copeia 2007 (no. 1), pp 64, Figs. 1A, 2.
Registered Keepers There are 165 registered keepers, view all "my cats" data.
Wishlists Love this species? Click the heart to add it to your wish list.
There are 10 wishes to keep this species, see who wants what.
Spotters Spotted this species somewhere? Click the binoculars!
There are 37 records of this fish being seen, view them all.
Forum BBCode
Search for H. contradens
Look up Look up H. contradens on
Look up on Fishbase Look up H. contradens on Fishbase
Look up on Encyclopedia of Life Look up H. contradens on Encyclopedia of Life
Look up on Global Biodiversity Information Facility Look up H. contradens on Global Biodiversity Information Facility
Hypancistrus contradens QR code LFS label creator
Last Update 2023 Jul 30 23:12 (species record created: 2001 Aug 27 00:00)