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The payara, which is also sold as the saber tooth barracuda, vampire fish, vampire tetra, or saber tusk barracuda, is a popular species for large, aggressive aquariums. It requires a large aquarium and can only be mixed with relatively large species, as smaller will be seen as potential prey. [4]
Hydrolycus armatus is a species of dogtooth characin found in freshwater of tropical South America. [2] It is sometimes known as Payara, [1] or harm, [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.
Cynodontidae are elongated in shape with a silvery or grey colour and an upturned mouth. Some species have a hunchbacked appearance. The family names (both scientific and common) derive from the long and well-developed canines which are used to spear their prey, mainly other fish.
Vampire fish is a colloquial name given to the following varieties of fish: Candiru (fish) (Vandellia cirrhosa), a species of parasitic freshwater catfish; Payara, a species of dogtooth tetra; Sea lamprey, a parasitic lamprey
Cynodontinae is a subfamily of tropical and subtropical South American fishes of the family Cynodontidae.They are characterized by an oblique mouth and very long distinct canines, which are used to capture and stab their prey, other fish that can be up to half the length of the cynodontine itself. [1]
Hydrolycus is a genus of large dogtooth characins from tropical South America, where found in the Amazon and Orinoco basins, as well as rivers of the Guianas. [1] The genus includes the largest dogtooth characins, reaching up to 1.17 m (3.8 ft) in length. [1]
The largest species is the Port Jackson shark (Heterodontus portusjacksoni) of Australasian waters, at up to 1.65 m (5.4 ft) long and weighing up to 20 kg (44 lb). [35] Mackerel sharks (Lamniformes) The dramatically large mouth of the basking shark, the second largest living fish Most species in this order grow quite large.
Like other Hydrolycus species, H. tatauaia has long pointed canine teeth that are used to spear their prey, generally smaller fish. [5] The body and head are silvery, and there is a vertically elongated dark spot behind the opercle. The tail is reddish to orange. [3] [5] [6] The species name tatauaia is of Tupi origin and means "fire tail".