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There are currently over 180 described species of Corydoras (commonly shortened to "cory"), making it one of the most speciose of all South American fish genera. There are also loads of undescribed species, many of which have been assigned a "C number" for identification purposes. This is a very simple system of numbering and is similar to the L number scheme used to identify undescribed Loricariids. Both systems were implemented by the German aquarium magazine DATZ (Die Aqua...

There are currently over 180 described species of Corydoras (commonly shortened to "cory"), making it one of the most speciose of all South American fish genera. There are also loads of undescribed species, many of which have been assigned a "C number" for identification purposes. This is a very simple system of numbering and is similar to the L number scheme used to identify undescribed Loricariids. Both systems were implemented by the German aquarium magazine DATZ (Die Aqua...

There are 2 other species that superficially resemble C. septentrionalis. These are C. simulatus and C. amapaensis. Simulatus differs from septentrionalis by the absence of the third set of small, upper (rictal) barbels, situated behind the other two pairs in both septentrionalis and amapaensis. Amapaensis differs in that it has a clear caudal fin. This fin is noticeably barred in septentrionalis....

Very similar in appearance to C. gossei, seussi can be distinguished by its less rounded snout. It may also be referred to by its C-number, C027.

There are currently over 180 described species of Corydoras (commonly shortened to "cory"), making it one of the most speciose of all South American fish genera. There are also loads of undescribed species, many of which have been assigned a "C number" for identification purposes. This is a very simple system of numbering and is similar to the L number scheme used to identify undescribed Loricariids. Both systems were implemented by the German aquarium magazine DATZ (Die Aqua...

This species can be identified from similar-looking congeners by possession of a pair of small rictal barbels. Its colour pattern can vary considerably depending on collection locality, with some forms having been misidentified as other species in the past. Those possessing a dark marking on the sides of the body are sometimes referred to as Corydoras sp. 'olga'.

There are currently over 180 described species of Corydoras (commonly shortened to "cory"), making it one of the most speciose of all South American fish genera. There are also loads of undescribed species, many of which have been assigned a "C number" for identification purposes. This is a very simple system of numbering and is similar to the L number scheme used to identify undescribed Loricariids. Both systems were implemented by the German aquarium magazine DATZ (Die Aqua...

This unidentified species was originally traded under the C-numbers C115 and C116 but these two are now thought to represent the same species, while fish collected from Manú National Park and sold as C. sp. 'Manu 1 long nose', C. sp. 'Manu 4', C. sp. 'Manu 7', and C. sp. 'Manu 8' may represent this species as well. It's highly variable in terms of colour patter...

This species was named the millenium cory because it was the first catfish species to be described in the year 2000. It was in fact described in late 1999, but the date of the journal containing the information was 01/2000. There are 4 other species of cory that may be confused with C. spectabilis at first glance. These are C. guapore, C. ourastigma, C. similis and C. caudimaculatus. They can be distinguished quite easily upon close examination, however. C. guapore, whilst exhibiting similar pat...

This species was formerly included in the genus Brochis alongside C. britskii and C. multiradiatus, and is sometimes referred to as 'common brochis'. Juveniles have a mottled colour pattern and are sometimes traded as 'hi-fin cory' due to their enlarged dorsal-fin. C. splendens can be told apart from other ex-Brochis species by possession of 10-12 dorsal-fin rays...

There are currently over 180 described species of Corydoras (commonly shortened to "cory"), making it one of the most speciose of all South American fish genera. There are also loads of undescribed species, many of which have been assigned a "C number" for identification purposes. This is a very simple system of numbering and is similar to the L number scheme used to identify undescribed Loricariids. Both systems were implemented by the German aquarium magazine DATZ (Die Aqua...

There are currently over 180 described species of Corydoras (commonly shortened to "cory"), making it one of the most speciose of all South American fish genera. There are also loads of undescribed species, many of which have been assigned a "C number" for identification purposes. This is a very simple system of numbering and is similar to the L number scheme used to identify undescribed Loricariids. Both systems were implemented by the German aquarium magazine DATZ (Die Aqua...

This species is sometime referred to as 'Virginia's catfish', Corydoras sp. 'Sangama' or 'Zangama', and prior to description was misidentified as both Corydoras bicolor and C. delphax. Unfortunately additional diagnostic characters cannot be provided since we've been unable to obtain the type description, and little has been written about this species since it was published.

Known from the Ucayali (río Samiria), Huallaga, Santiago, and Pastaza (ríos Bobonaza and Pindo) river systems in eastern Ecuador and northern Peru. These are all tributary drainages within the middle Río Marañón watershed, a major affluent of the upper Amazon river basin. Type locality is 'Río Hallagua system, Yurimaguas...

This unusual tetra is not often seen on sale in the trade, but is never particularly expensive when available. It is currently the only member in the genus although the family Glandulocaudinae actually contains about 20 member genera. None are especially popular aquarium fish, although a couple of Mimagoniates species are occasionally seen in the hobby. Almost all members of the Glandulocaudinae are characterised by the presence of secretory caudal glands in male fish, the particular structur...

A rarely seen species in the trade, although it's kept quite often by Australian hobbyists. Members of this genus are thought to have a more ancient association with Australian freshwaters than most others found in these habitats. Craterocephalus also contains the most species of any Australian freshwater fish genus. It has been shown that there are quite large genetic differences between groups of the species living in close proximity to each other, and even sharing the same waters. In ...

Rarely seen in the hobby in the UK, but makes an interesting addition to a South American setup.

Crenicichla albopunctata

Crenicichla compressiceps are an excellent little fish. They are small, but they swim a great deal (and can be incredibly quick) so require larger aquaria than other, similar sized fish. In the wild, Compressiceps are insect feeders. They will wait quietly then quickly sweep down and prey on any nearby insects. They have good vision in the night and will often feed in the dark. Be careful when choosing tankmates, though as previously mentioned it may be mandatory to include some fish to e...

As stated, this fish is found across most of the Amazon basin. As a result, a number of different colour forms have developed. This pike is fairly common in the hobby due to its broad geographic range.