Hydrolycus armatus
| Hydrolycus armatus | |
|---|---|
| |
| Adult in Berlin Aquarium, Germany | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Characiformes |
| Family: | Cynodontidae |
| Genus: | Hydrolycus |
| Species: | H. armatus
|
| Binomial name | |
| Hydrolycus armatus (Jardine, 1841)
| |
Hydrolycus armatus is a species of dogtooth characin found in freshwater of tropical South America.[2] It is sometimes known as harm,[1] or payara,[3][4][5] a name it shares with the related H. scomberoides.
This predatory fish occasionally makes its way into the aquarium trade, but it requires a very large tank.[3][6] In its native range it is considered a major gamefish.[5][6]
Distribution and habitat
This species of fish is found in the Amazon, Orinoco and Essequibo basins in tropical South America.[2][7] They are found in several different freshwater habitats, but often in fast-flowing water.[5][8] They are typically found in deeper waters during the day.[8] The species is locally common; in a major study of a Venezuelan floodplain river, 1⁄3 of the collected fish were H. armatus, and the species was particularly common in creeks and lagoons.[9] At least some populations are migratory.[8]
Description
Hydrolycus armatus are overall silvery. In adults the base of the tail and anal fin is pale yellowish, and the distal part is blackish, contrasting with a narrow white edge at the very tip (unique among Hydrolycus species).[3][7][10]
A typically reported maximum total length of this fish is 89 cm (2 ft 11 in),[2] but records show specimens up to 95 cm (3 ft 1 in) in Venezuela[4] and more than 100 cm (3.3 ft) in Brazil.[5] It typically weighs up to 8.5 kg (18 lb 12 oz),[2] but can reach almost 18 kg (40 lb).[5] It has frequently been confused with the generally smaller H. scomberoides.[3][7] H. armatus reaches maturity when at least 30 cm (1 ft) long.[8] Like other dogtooth characins, it has very long pointed canine teeth. In H. armatus these can surpass 5 cm (2 in) in length in large individuals.[4] These are used for spearing their prey, usually other fish.[10]
References
- ^ a b Salvador, G.N. (2023). "Hydrolycus armatus". IUCN Red List of Threatened Species. 2023: e.T49829538A91630365. doi:10.2305/IUCN.UK.2023-1.RLTS.T49829538A91630365.en. Retrieved 24 June 2024.
- ^ a b c d Froese, Rainer; Pauly, Daniel (eds.). "Hydrolycus armatus". FishBase. January 2017 version.
- ^ a b c d "Hydrolycus armatus". SeriouslyFish. Retrieved 13 January 2017.
- ^ a b c "Payara Venezuela". OPEFE. Retrieved 13 January 2017.[dead link]
- ^ a b c d e "Payara—Hydrolycus armatus". Acute Angling. Retrieved 19 October 2017.
- ^ a b Scott, B.M. (March 2007). "Taming the Untamable—Giant Payara!". TFH Magazine. Retrieved 19 October 2017.
- ^ a b c Toledo-Piza, M.; N.A. Menezes; G.M. Santos (1999). "Revision of the Neotropical fish genus Hydrolycus (Ostariophysi: Characiformes: Cynodontidae) with the description of two new species". Ichthyol. Explor. Freshwaters. 10 (3): 255–280.
- ^ a b c d van der Sleen, P.; J.S. Albert, eds. (2017). Field Guide to the Fishes of the Amazon, Orinoco, and Guianas. Princeton University Press. p. 155. ISBN 978-0691170749.
- ^ Layman, C.A..; K.O. Winemiller (2005). "Patterns of habitat segregation among large fishes in a Venezuelan floodplain river". Neotrop. Ichthyol. 3 (1): 111–117. doi:10.1590/S1679-62252005000100007.
- ^ a b "Subfamily Cynodontinae". OPEFE. Retrieved 19 October 2017.[dead link]