Hydrolycus armatus – Payara | 水產百科網

MAXSTANDARDLENGTH—MaximumStandardLength.Thelargestofficially-recordedspecimenmeasured660mmbutitmaygrowlarger.

Hydrocyon armatus Jardine, 1841

Hydrolycus: from the Greek hydro, meaning ‘water’, and lykos, meaning ‘wolf’.

armatus: from the Latin armatus, meaning ‘armour, armed or armoured’, presumably in reference to its fearsome dentition (Jardine did not specify).

Order: Characiformes Family: Cynodontidae[1][2]

Type locality is ‘sandbars in vicinity of Maipuri campsite, 4°34’N, 58°35’W, Essequibo River, Guyana’, with current records suggesting it to occur in the eastern Amazon basin in Brazil, Río Orinoco in Venezuela and Essequibo drainage in Guyana.

This species is pelagic and adults tend to be associated with flowing stretches of main river channels and larger tributaries of both white and black water rivers, although it’s also known from a number of a...