armatus, though that species grows considerably larger, is popular with sports anglers and unsuitable for all but the very largest home aquaria. It’s regularly confused with the payara, H. This species may be referred to using a variety of names including ‘scomb’, ‘sabre tooth tetra’, ‘sabre tusk barracuda’, ‘dog tooth characin, ‘vampire fish’, ‘Cachorra’ or ‘Pirandirá’ (the latter two names being used in Brazil where they’re also applied to congeners). Juveniles tend to adopt a presumably cryptic, oblique, ‘head-down’ position and lurk among the décor whereas adults are fully pelagic. It can also be maintained in a group in a suitably-sized aquarium but the purchase of at least three specimens is advisable. Behaviour and Compatibility Top ↑īest kept alone or with similarly-sized, non-aggressive fishes since it’s actually quite peaceful with those too large to be considered food. To find high quality fish foods, click here. It also does best if there is a high proportion of dissolved oxygen and moderate degree of water movement so external filters, powerheads, airstones, etc., should be employed as necessary.Īs stable water conditions are obligatory for its well-being this fish should never be added to biologically-immature aquaria and weekly water changes of 30-50% aquarium volume should be considered mandatory.Ī tightly-fitting cover is essential as this species is a prodigious jumper, and it may also prove beneficial to cover the back and sides of the aquarium in order to reduce the chances of it swimming into the glass since it can be skittish, especially in confined surroundings. Like many fishes that naturally inhabit running waters it’s intolerant to the accumulation of organic wastes and requires spotless water at all times in order to thrive. While the majority of aquatic plants will fail to thrive in such surroundings hardy genera such as Microsorum, Bolbitis, or Anubias spp. This can be further furnished with driftwood roots and branches if you wish but be sure to leave plenty of open swimming space. The aquarium should ideally be designed to resemble a flowing stream or river with a substrate of variably-sized rocks, sand, fine gravel, and some larger water-worn boulders. Other aquarium filters which have been recommended highly by customers in your area can be found here. Maximum Standard LengthĪn aquarium with base dimensions of 210 ∗ 75 cm should be the absolute minimum considered. Juveniles presumably occur in smaller tributaries and areas of flooded forest. Reproduction occurs between November and April and adults perform long upstream migrations in order to do so. 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. Type locality is given simply as ‘Brazil’ but this species is currently understood to be widespread in the central and upper Amazon River system in Brazil, Bolivia, Peru and Ecuador, with the rio Tapajós in Brazil appearing to mark the downstream limit of its range. Order: Characiformes Family: Cynodontidae Distribution Scomberoides: from the Greek skombros, meaning ‘tuna, mackerel’, and the suffix -oides, meaning ‘similar to’. Hydrolycus: from the Greek hydro, meaning ‘water’, and lykos, meaning ‘wolf’. Hydrocyon scomberoides Cuvier, 1819 Cynodon pectoralis Günther, 1866 Etymology Hydrolycus scomberoides (CUVIER, 1819) Vampire Tetra Synonyms Top ↑
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