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Physopyxis ananas Sousa & Rapp Py-Daniel, 2005

Image contributors to this species:

Stuart Brown (1)

ScotCat Sources:

Factsheet Etymology = Genus Etymology = Species

Other Sources:

Fishbase  Google Search  All Catfish Species Inventory


Relevant Information:

There are three species in this genera, P. ananas, P. cristata and the more well known P. lyra with the first two being described by Sousa and Py-Daniel (2005). P. ananas has lateral plates with two or more series of spines; depth of superior wing of lateral plates equal to or less than that of inferior wing; coracoid processes narrow and converging toward central axis of the body; adipose fin usually absent. Physopyxis ananas can be distinguished from
other Physopyxis species by presence of at least one additional row of spines on dorsal wings of lateral plates, above lateral line. Additionally, P. ananas differs by having a more slender, slightly convergent and pointed coracoid processes vs. coracoid processes more robust with knob-like divergent tips in P. lyra. Physopyxis ananas also differs by having a complete series of lateral line plates vs. incomplete in P. cristata. Aquarium care: Predominantly nocturnal, and spends most of day time sheltered among submersed root mats or buried in sand. Diet: Will eat most prepared foods such as sunken flake and tablet foods but has a liking for frozen bloodworm. Remarks: Physopyxis ananas has the widest distribution among the species of the genus, occurring throughout lowlands in entire Amazon (including rio Negro) and rio Essequibo basins

Common Name:







South America: Amazon (including Negro River) and Essequibo River basins. Type locality: utaí River, Solimões River basin, Amazonas State, Brazil (02º45'40''S; 66º47'59''W).


2.5cm. (1ins)


23-26°C (73-79°F)




Sousa, L.M. and L.H. Rapp Py-Daniel 2005 Description of two new species of Physopyxis and redescription of P. lyra (Siluriformes: Doradidae). Neotrop. Ichthyol. 3(4):625-636.
Ferraris, C.J. Jr., 2007. Checklist of catfishes, recent and fossil (Osteichthyes: Siluriformes), and catalogue of siluriform primary types. Zootaxa 1418:1-628.
Froese, R. and D. Pauly. Editors. 2017.FishBase. World Wide Web electronic publication. www.fishbase.org, ( 02/2017 )



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