Results for “pre-”

An obligate dweller of swiftly-flowing streams and headwaters containing clear, oxygen-saturated water. It often inhabits riffles and runs and is likely to display a preference for shallower zon...

Also known as the golden trahira, H. unitaeniatus is the only one of the three recognised species currently in the genus to appear in the trade with any regularity. It's really a fish suitable only for the specialist, and as with any predatory species, care must be taken when performing tank maintenance. It's a representative of an ancient group of fishes, and possesses a modified, highly vascularised swim bladder that acts as an accessory breathing organ, allowing the fish to survi...

A voracious piscivore this species is perfectly designed for its lifestyle. It is very streamlined and muscular and has one of the most amazing sets of teeth of any freshwater fish. These are dagger-shaped and interlock, meaning the fish can rip chunks out of its prey. The teeth are visible even when the animal's mouth is closed, which makes for a fearsome sight. It is one of the world's most infamous game fish and specimens weighing over 100 pounds have been recorded. We cannot st...

A voracious piscivore that hunts in large shoals in the wild, this species is perfectly designed for its lifestyle. It is very streamlined and muscular and has one of the most amazing sets of teeth of any freshwater fish. These are dagger-shaped and interlock, meaning the fish can rip chunks out of its prey. The teeth are visible even when the animal's mouth is closed, which makes for a fearsome sight. It is a popular game fish in its native range, with the largest specimen caught weighi...

L136 and its variants are collected in the rio Negro basin, Amazonas state, Brazil, and in particular the rio Demini, a northern tributary flowing into the central Negro in the municipality of Barcelos. Collection details for LDA05 and LDA06 are currently unclear but presumably in the vicinity. This unidentified 'species' is highly variable in terms of colour pattern, and it has been assigned a ser...

The genus Hypancistrus is diagnosed from all other loricariids by a wide separation between the metapterygoid and lateral ethmoid, presence of a sharply angled adductor palatini crest of the hyomandibula, and no lateral wall in the metapterygoid channel. More useful for aquarists is the fact that in Hypancistrus the dentary teeth are about twice a...

It differs from H. paucilepis by possessing 30-31 scales in the lateral row (vs. 28-29), 3 scales between the lateral line and anal-fin (vs. 4), 10 predorsal scales (vs. 9), ii, 9 dorsal-fin rays (vs. iii, 8), 4 maxillary teeth (vs. 1), and the distance between the dorsal-fi...

Generally peaceful making it an ideal resident of the well-researched community aquarium. It is perhaps best-maintained alongside similarly-sized characids, gasteropelecids, lebiasinids, smaller callichthyid or loricariid catfishes and non-predatory, medium-sized cichlids. Try to buy a mixed-sex group of at least 8-10 specimens, incl...

This species superficially resembles the popular silver-tipped tetra, Hasemania nana, but can easily be told apart by presence (vs. absence) of an adipose-fin. It can be told apart from other Hyphessobrycon sp...

In the igarapés Baré and Ubim, western Brazil H. erythrostigma was collected from stretches measuring 5-7 metres in width with thick riparian and overhanging vegetation. The substrate was mostly composed of sand and the fish displayed a preference for boundary zones between shallow and deeper water. Conductivity was measured at 14.2-62.1 mS/cm³, dissolved oxy...

H. eschwartzae is told apart from other laterally-striped Hyphessobrycon species from the Madre de Dios watershed by the following characters: 4 simple anal-fin rays (vs. 3 in other species listed); 13-15 dentary teeth (vs. 5-11); 6 teeth in the internal premaxillary ro...

Hyphessobrycon melanostichos shares a number of similarities with Hyphessobrycon sp. Blue Ribbon. The former can be differentiated from the latter by a lighter set, more streamlined body , smaller humeral spot and also red colouring, which is not present on the Blue Ribbon tetra. Care and maintenance of the two species is however, virtually the same.

This is the smallest of three similar-looking species most commonly-referred to as the 'bleeding heart' subgroup, the other two being H. erythrostigma and H. socolofi. All possess a reddish humeral spot which is not present in any other characid with other shared characters including possession of 6 -14 maxillary teeth, 7-9 scales above the lateral line, 5-7 scales below the lateral line and 26-33 anal fin rays.

A beautiful species that is very similar to a host of others in the genus, some of which are undescribed. The most common of these in the hobby is H. bentosi. The two are so similar in appearance that H. rosaceus was once considered to be a subspecies of H. bentosi. The easiest way to distinguish them is by the presence of a dark marking just behind the operculum in H. bentosi, which is lacking in H. rosaceus. As with the closely related Hemigrammus, the taxonomic status of all species in the...

In the aquarium hobby the name Hyphessobrycon stegemanni has frequently been misapplied to a species that has been described as Hemigrammus ataktos Marinho, Dagosta, & Birindelli 2014. The reasons for this confusion are presumably that the two occur sympatrically in the rio Tocantins system and both possess a dark lateral stripe on the body.

This undescribed species is part of the Hypostomus cochliodon complex, all of which were previously included in the genus Cochliodon. This is now considered a synonym of Hypostomus. Members of this group can be distinguished from congeners by several differences in morphology, most notably the hump-backed profile of mature fish and spoon-shaped dentition. These features, along with the fishes tendency to eat wood, are shared with the Panaque genus of the Ancistrinae subfamily, but the two genera...

This species is part of the Hypostomus cochliodon complex, all of which were previously included in the genus Cochliodon, which is now considered a synonym of Hypostomus. Members of this group can be distinguished from congeners by several differences in morphology, most notably the hump-backed profile of mature fish and spoon-shaped dentition. These features, along with the fishes tendency to eat wood, are shared with the Panaque genus of the Ancistrinae subfamily, but the two genera are known ...

This undescribed species is part of the Hypostomus cochliodon complex, all of which were previously included in the genus Cochliodon, which is now considered a synonym of Hypostomus. Members of this group can be distinguished from congeners by several differences in morphology, most notably the hump-backed profile of mature fish and spoon-shaped dentition. These features, along with the fishes tendency to eat wood, are shared with the Panaque genus of the Ancistrinae subfamily, but the two gener...

Supposedly exported from the upper Amazon region in Peru but precise details are lacking. It's unclear whether this unidentified species is conspecific with the similarly nameless congener L266 or not.

This undescribed species is part of the Hypostomus cochliodon species complex, all members of which were previously included in the genus Cochliodon, now considered a synonym of Hypostomus. Members of this group can be distinguished from congeners by several differences in morphology, most notably the hump-backed profile of mature fish and spoon-shaped dentition. These features, along with the fishes tendency to eat wood, are shared with the Panaque genus of the Ancistrinae subfamily, but the tw...