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Cory's; Varieties & Keeping Info
Topic Started: Sep 2 2007, 08:36 PM (1,447 Views)
sthn75
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Yellow Tang
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Corydoras catfish

Scientific name(s): Corydoras species

Max size: around 5 cm for most species, some reach 7 to 8 cm, a few grow larger (eg C. barbatus can reach 12 cm). Dwarf species (C. habrosus, C. hastatus & C. pygmaeus) to 3 cm.

Water quality: pH around neutral, soft to quite hard water, low nitrate

Temperature: 22 to 26°C for most species

Temperament: Peaceful schooling fish

Suggested for: nearly all community tanks, particularly with small to medium community fish

Suggested foods: A good quality tropical granule or small sinking pellet, supplemented with frozen shrimp and worm foods, daphnia, beefheart.

Sexing: There is little or no difference in most species, although females may be plumper when ready to spawn and males may have more intense colouration. In a very few species (eg C. paleatus), males have a taller dorsal fin.

Corydoras varieties:

* Bronze, albino & peppered catfish (Corydoras aeneus & paleatus)
* Masked corydoras & similar species (Corydoras atropersonatus, leucomelas, melanistus & others)
* Leopard corydoras & similar species (Corydoras julii, trilineatus, leopardus & others)
* Panda & arcuatus catfish & similar species (Corydoras panda, arcuatus, metae & others)
* Other species (including Corydoras adolfoi, sterbae, undulatus & others)


Other Info:

The name Corydoras is derived from the Greek kory (helmet) and doras (skin). Corydoras is by far the largest genus of neotropical fishes with over 142 species. In addition, many variants exist.

Several hundred Corydoras species are not yet classified, but kept by aquarists. These species are given C-Numbers, originally devised by Hans-Georg Evers for the German fishkeeping magazine DATZ in 1993. In 2006, there were 153 C-numbers assigned, of which 32 had been assigned appropriate scientific names.

Corydoras are generally found in smaller-sized streams, along the margins of larger rivers, in marshes and ponds. They are native to slow-moving and almost still (but seldom stagnant) streams and small rivers of South America where the water is shallow and very clear. Most species are bottom-dwellers, foraging in sand, gravel, or detritus. The banks and sides of the streams are covered with a dense growth of plants, and this is where the corys are found. They inhabit a wide variety of water types but tend toward soft, neutral to slightly acidic or slightly alkaline pH and 5-10 degrees of hardness. They can tolerate only a small amount of salt (some species tolerate none at all) and do not inhabit environments with tidal influences. They are often seen in shoals. Most species prefer being in groups and many species are found in schools or aggregations of hundreds or even thousands of individuals, usually of a single species, but occasionally with other species mixed in. Unlike most catfishes which are nocturnal, Corydoras species are active during the daytime.

Their main food is bottom-dwelling insects and insect larvae and various worms, as well as some vegetable matter. Although no corys are piscivorous, they will eat flesh from dead fishes. Their feeding method is to search the bottom with their sensory barbels and suck up food items with their mouth, often burying their snout up to their eyes, one of the reasons a soft sand substrate is preferable.

In several species of Corydoras, it has been observed that the fishes, after initial evasive reaction to threat, lay still; this is suggested to be a form of cryptic behavior. However, it is also argued that most species do not have cryptic coloration nor freezing behavior and continue to exist.

Corydoras are well known among aquarists for its many ornamental species. They are well suited to tropical freshwater community aquariums, as they get along well with other species and are not at all aggressive. Corys are shy fish and it is recommended to keep them in groups of at least six as most species seem to form shoals in the aquaria. Corys are mostly bottom feeders, so they should be offered flake foods (which do sink), sinking pellets, and supplements of live and frozen foods, but care should be taken to prevent all the food from being eaten by the faster-moving fish at the higher levels of the tank.

Most corys prefer soft, acidic water. However, they can tolerate a wide range of water conditions. They do not do well in fish tanks with high nitrate levels. This ion leads to the infection of the barbels, which will shorten and become useless. The barbels may also be affected by constant contact with a sharp substrate. These are easy fish to keep, being peaceful, small, hardy, active, and entertaining. Occasionally they will dart to the surface, sticking their snout above the water for an instant, appearing to take a "breath" of fresh air. This behavior is perfectly normal and is not an indication that anything is wrong with the fish.

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sthn75
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Yellow Tang
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Jullii Cory

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Bronze Cory

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Albino Cory
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mars.40
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Lion Fish
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Good info sthn, :thanks
Anyone have photos they would like to add?
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sthn75
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Yellow Tang
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No probs Mars... It's good to have this sort of info handy :yes :thumb

I didn't realise though, I haven't taken very many pics at all of my albino cory's.. must do that..

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Stuart Elflett
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Angelfish
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Did you want more cory's, mars??

http://www.nettaigyo.com/corydoras/encyc/corydoras-all.html

:hysterical
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iceken
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:hysterical :lol: :hysterical :lol:

good one stuart. nice site btw
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sthn75
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Yellow Tang
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Yeah.... had a quick look at that site this morning.... sure is alooooot of Cory's :blink: :rolleyes: :lol:


Included above:
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Corydoras is by far the largest genus of neotropical fishes with over 142 species. In addition, many variants exist.  Several hundred Corydoras species are not yet classified, but kept by aquarists.



I guess that site just really emphasises just how huge the species is :yes
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Stuart Elflett
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Angelfish
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I couldn't see the laser/neons on there, either... I want neon cory's to go with the rams and neon tetras... my very own glow in the dark tank... :)
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sthn75
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Yellow Tang
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Like some of these ones Stuart....

Neon Red Stripe Posted Image

Emerald Cory Posted Image

Orange Cory Posted Image

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mars.40
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Lion Fish
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:hysterical Stuart

:drool Nice photos sthn. :thumb
A couple of my corys

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sthn75
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Yellow Tang
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:photos Just gotta love those Jullii's Mars :yes :thumb :thumb

What is the other type? :unsure2:
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Stuart Elflett
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Angelfish
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I spent ages going back and forth between julli's and my albino's...

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And yes, those sort of laser/neon cory's... :)
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sthn75
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Yellow Tang
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I think I like the Neon Red Stripe Cory's...

Can we even get those here in Australia :unsure2: :unsure2:
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mars.40
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Lion Fish
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:photos Stuart.
sthn, I have no idea, but would like to know as well, *wouldnt it be nice*
:lol:
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Stuart Elflett
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Angelfish
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There's a neon green, too, Wendz...

I've been told they can come in with transhippers who bring in Betta's, but I'm yet to follow that up...
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