Category:Corydoras

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Leopard Cory
While there are hundreds of catfish available to the aquarist today, only a few are suitable for the casual hobbyist. Almost all of these are cory cats - fish in the genus Corydoras. These little, armoured catfish, mostly from South America, are comical, attractive, peaceful, and easy to keep.
Pronunciation: Corydoras = "Kory DOOR uss"
Size: 4cm - 7cm
Feeding: bottom scavenging for algae, live food, and food waste
Temperament: community, prefer species group
Origin: South America

Corydoras in the Wild


General Care of Corydoras

Diet

As with most Corydoras, these fish will eat most food which sinks to the bottom of the tank. Sinking algae pellets should be supplemented with flake food or other sinking foods like catfish pellets.
Be aware these fish do have a carnivorous side to them and love foods such as Bloodworm and Brine Shrimp. Vegetable-based foods offer little nutrition to them. They will also eat any dead, dying, or even injured fish, that sit on the substrate too long. They're very opportunistic!

Environment Specifics

Requires a sand or small gravel substrate and prefers a planted tank. Keeping a cory on sharp or large gravel can lead to damage to their barbels, which when infected will make it hard for the cory to find food.
Corys are sensitive to salt, as with other scaleless fish, adding salt to the tank will cause them harm.

Behaviour

  • The Corydoras group of fish frequently gulps air. This is normal and is not a cause for concern. If too little room is available between the water surface and the hood (<2") the fish may hit the hood. They hold the air in their stomach and the thin lining dissipates the oxygen.
  • This fish likes the company of its own kind. It is recommended to keep at least 2, or better yet, several of the same species. The more you have, the more secure they are and the more you will see them.
  • They are known to 'blink' their eyes to the amazement of onlookers. The Cory has the ability to tilt its eye down to examine the nearby substrate.

Websites on Corydoras

Breathing

In these fish the posterior intestine is modified to function as an air breathing organ by being air-filled, thin-walled and highly vascularized. This means the fish often comes to the surface to swallow gulps of air and passes this to its rear intestine to supplement its oxygen intake via its gills.

Breeding

See our article on breeding Corydoras here.

Spawning behaviour of Corydoras

The male will try to get his body in front of the female whilst she is on the substrate. He positions himself midway across her head in a classic 'T' shape with his anal opening against her mouth.
If the female is interested the female attaches her mouth to the male's genital opening and directly drinks his sperm. The sperm pass through her intestine and are discharged together with eggs into the ‘pouch’ formed by her pelvic fins. [1]

The Poison of the Corydoras

Many species of Corydoras have a poisonous self-defence mechanism against being eaten by much larger fish. All Corys have very sharp fin spines and some seem to give off a low level toxic chemical into the water when frightened or highly stressed.[2] This toxin is believed to be only mildly irritating to people and only if the person is stressing and handling the Cory with their bare hands and is stung.[3] [4]

Self-Poisoning

A rare but recorded event is that at least some some species of Corys appear to be capable of releasing a poisonous mucus from its gills when alarmed which causes itself and other fish in confined volumes of water to rapidly die. Species believed to show this trait are C. adolfoi, C. arcuatus, C. melini, C. metae, C. panda, C. robineae', C. rabauti, C. atropersonatus, C. sterbai and C. trilineatus. This ability is poorly researched and other Corydoras species may be affected. [5][6]

References

  1. Sperm drinking by female catfishes: a novel mode of insemination, , Masanori, Kohda, Environmental Biology of Fishes, 1995
  2. David Sands in his 1982 publication "Catfishes of the World" vol. 1. ISBN 0-444-42282-X
  3. Corydoras owners discussing Poisonous spines in Corys
  4. Diversity, phylogenetic distribution, and origins of venomous catfishes by Jeremy J Wright, 2009.
  5. PFK issue 10 Oct 2008:page 26-Ian Fuller
  6. new atropersonatus batch


Common Name Species Name Image Difficulty Maximum Size Tank Size
Adolfo's Cory Corydoras adolfoi Corydoras adolfoi5839.jpg Moderate 6 cm 20 gal
Amanda Cory Corydoras amandajanea No Image.png Easy 5.9 cm 15 gal
Arched Corydoras Corydoras arcuatus Corydorasarcuatus-3593.jpg Moderate 3 in 30 gal
Armatus Corydoras Corydoras armatus No Image.png Moderate 2.4 in 15 gal
Axelrod's Corydoras Corydoras axelrodi No Image.png Moderate 2 in 20 gal
Bandit Cory Corydoras metae Corydorus metae 1.jpg Moderate 2 in 20 gal
Black Fin Cory Corydoras leucomelas Corydoras-leucomelas.jpg Moderate 2 in 20 gal
Black Sail Cory Corydoras melanistius No Image.png Moderate 2.2 in 20 gal
Black-Back Cory Corydoras duplicareus Corydoras duplicareus.jpg Moderate 2.4 in 20 gal
Black-Fin Cory Corydoras condiscipulus No Image.png Moderate 2.6 in 20 gal
Blackstripe Cory Corydoras bondi No Image.png Moderate 2 in 20 gal
Breei Cory Corydoras breei No Image.png Moderate 1.8 in 15 gal
Bronze Cory Corydoras aeneus Corydoras aeneus.jpg Easy 7 cm 20 gal
Burgess' Cory Corydoras burgessi No Image.png Moderate 2.2 in 20 gal
Colicana Cory Corydoras incolicana No Image.png Moderate 3.2 in 30 gal
Copei Cory Corydoras copei No Image.png Moderate 2 in 15 gal
Delphax Cory Corydoras delphax Corydoras delphax.jpg Moderate 2.8 in 20 gal
Diphyes Cory Corydoras diphyes No Image.png Moderate 2 in 15 gal
Dusky Corydoras Corydoras septentrionalis No Image.png Moderate 2.5 in 20 gal
Ehrhard's Cory Corydoras ehrhardti No Image.png Moderate 2.2 in 20 gal
Elegant Cory Corydoras elegans Three corydorus elegans close up.JPG Moderate 2.2 in 20 gal
Ephippifer Cory Corydoras ephippifer No Image.png Moderate 2.6 in 20 gal
Fairy Corydoras Corydoras atropersonatus Fairycorydora.jpg Moderate 2 in 20 gal
False Bandit Cory Corydoras melini Corydoras melini.jpg Moderate 1.8 in 20 gal
False Network Cory Corydoras sodalis No Image.png Moderate 2.4 in 20 gal
Flag-Tailed Corydoras Corydoras robineae No Image.png Moderate 2.8 in 30 gal
Flag-Tailed Panda Cory Corydoras oiapoquensis No Image.png Moderate 2.2 in 20 gal
Fowler's Cory Corydoras fowleri Corydoras-fowleri.jpg Moderate 2.8 in 30 gal
Garbei Cory Corydoras garbei No Image.png Moderate 2 in 15 gal
Geryi Cory Corydoras geryi No Image.png Moderate 2.8 in 30 gal
Gomez Cory Corydoras gomezi No Image.png Moderate 2.4 in 20 gal
Gray Cory Corydoras griseus No Image.png Moderate 2 in 20 gal
Green-Gold Cory Corydoras melanotaenia Corydoras melanotaenia.jpg Moderate 2.4 in 20 gal
Guapore Cory Corydoras guapore No Image.png Moderate 2 in 20 gal
Imitator Cory Corydoras imitator No Image.png Moderate 2.6 in 20 gal
Leopard Cory Corydoras trilineatus Corydora Trilineatus-9773.jpg Moderate 2 in 20 gal
Leopard Cory Corydoras julii Corydoras julii1.jpg Moderate 2.5 in 20 gal
Leopard Cory Corydoras leopardus No Image.png Moderate 3 in 20 gal
Long-Finned Corydora Corydoras longipinnis No Image.png Moderate 3 in 20 gal
Long-Nosed Skunk Cory Corydoras narcissus Corydoras narcissus9184.jpg Moderate 3 in 55 gal
Long-Nosed Smudge Spot Cory Corydoras ourastigma No Image.png Moderate 2.6 in 20 gal
Loreto Cory Corydoras loretoensis No Image.png Moderate 2 in 20 gal
Loreto Panda Cory Corydoras ortegai Corydoras ortegai9938.jpg Moderate 1.6 in 20 gal
Loxozonus Cory Corydoras loxozonus Corydoras-loxozonus.jpg Moderate 2.2 in 20 gal
Many-Spotted Cory Corydoras polystictus No Image.png Easy 2 in 20 gal
Millenium Cory Corydoras spectabilis No Image.png Moderate 2.8 in 30 gal
Mosiac Cory Corydoras haraldschultzi Corydoras haraldschultzi.jpg Moderate 3.4 in 30 gal
Napo Cory Corydoras napoensis No Image.png Moderate 2 in 20 gal
Natterer's Cory Corydoras nattereri No Image.png Moderate 2.6 in 20 gal
Nijssen's Cory Corydoras nijsseni No Image.png Moderate 2 in 20 gal
Olga Cory Corydoras simulatus No Image.png Moderate 2.8 in 30 gal
Ornate Cory Corydoras ornatus No Image.png Moderate 2.8 in 20 gal
Panda Corydoras Corydoras panda Panda cory.jpg Moderate 2 in 20 gal
Pantana Cory Corydoras pantanalensis Corydoras pantanalensis.jpg Moderate 3.2 in 30 gal
Pastaza Cory Corydoras pastazensis No Image.png Moderate 2.8 in 30 gal
Peppered Cory Corydoras paleatus Pepperedcory.jpg Moderate 3 in 20 gal
Peru Black Cory Corydoras semiaquilus Corydoras semiaquilus5839.jpg Moderate 3.2 in 30 gal
Pinheiroi Cory Corydoras pinheiroi No Image.png Moderate 2.6 in 20 gal
Pretty Cory Corydoras pulcher No Image.png Moderate 2.6 in 20 gal
Pygmy Cory Corydoras pygmaeus Corydoras pygmaeus-6746.jpg Moderate 1.3 in 15 gal
Reticulated Cory Corydoras reticulatus Reticulatus2805es.jpg Moderate 2.4 in 20 gal
Reynold's Cory Corydoras reynoldsi No Image.png Moderate 3.2 cm 15 gal
Robust Cory Corydoras robustus No Image.png Moderate 3.8 in 40 gal
Sailfin Brochis Brochis splendens Brochis splendens345.jpg Easy 25 in 25 gal
San Juan Cory Corydoras bilineatus No Image.png Moderate 1.75 in 15 gal
Sand's Cory Corydoras davidsandsi Corydoras davidsandsi3453.jpg Moderate 2.4 in 20 gal
Sangama Cory Corydoras virginiae No Image.png Moderate 2.4 in 20 gal
Santa Cruz Cory Corydoras cruziensis No Image.png Moderate 2 in 15 gal
Schwartz's Cory Corydoras schwartzi Corydoras schwartzi1.jpg Moderate 2 in 20 gal
Slate Cory Corydoras concolor No Image.png Moderate 2.4 in 20 gal
Smokey Cory Corydoras gossei No Image.png Moderate 2.4 in 20 gal
Smudge Spot Cory Corydoras similis No Image.png Moderate 2.4 in 20 gal
Spotted Cory Corydoras agassizii Corydorasagassizii.jpg Moderate 2.8 in 20 gal
Spotted Corydoras Corydoras ambiacus No Image.png Moderate 2.4 in 15 gal
Spotty Cory Corydoras brevirostris No Image.png Moderate 2.4 in 20 gal
Sterba's Corydoras Corydoras sterbai Corydoras sterbai 01.jpg Easy 2.6 in 20 gal
Suessi Cory Corydoras seussi No Image.png Moderate 2.8 in 20 gal
Tail Spot Pygmy Cory Corydoras hastatus Corydoras hastatus.jpg Moderate 1.5 in 15 gal
Tail-Spot Corydoras Corydoras caudimaculatus No Image.png Moderate 2 in 15 gal
Two Saddle Cory Corydoras weitzmani No Image.png Moderate 2.2 in 20 gal
Venezuelan Pygmy Cory Corydoras habrosus Habrosus4.jpg Moderate 1.4 in 15 gal
Xingu Cory Corydoras xinguensis No Image.png Moderate 2 in 20 gal
Zygus Cory Corydoras zygatus Corydoras zygatus.jpg Moderate 2.8 in 30 gal

Pages in category "Corydoras"

The following 209 pages are in this category, out of 209 total.

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