Category:Corydoras

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About Corydoras

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

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 2.362 in6 cm 20 USGallon75.708 liters
75,708.236 mL
Amanda Cory Corydoras amandajanea No Image.png Easy 2.323 in5.9 cm 15 USGallon56.781 liters
56,781.177 mL
Arched Corydoras Corydoras arcuatus Corydorasarcuatus-3593.jpg Moderate 3 in7.62 cm 30 USGallon113.562 liters
113,562.353 mL
Armatus Corydoras Corydoras armatus No Image.png Moderate 2.4 in6.096 cm 15 USGallon56.781 liters
56,781.177 mL
Axelrod's Corydoras Corydoras axelrodi No Image.png Moderate 2 in5.08 cm 20 USGallon75.708 liters
75,708.236 mL
Bandit Cory Corydoras metae Corydorus metae 1.jpg Moderate 2 in5.08 cm 20 USGallon75.708 liters
75,708.236 mL
Black Fin Cory Corydoras leucomelas Corydoras-leucomelas.jpg Moderate 2 in5.08 cm 20 USGallon75.708 liters
75,708.236 mL
Black Sail Cory Corydoras melanistius No Image.png Moderate 2.2 in5.588 cm 20 USGallon75.708 liters
75,708.236 mL
Black-Back Cory Corydoras duplicareus Corydoras duplicareus.jpg Moderate 2.4 in6.096 cm 20 USGallon75.708 liters
75,708.236 mL
Black-Fin Cory Corydoras condiscipulus No Image.png Moderate 2.6 in6.604 cm 20 USGallon75.708 liters
75,708.236 mL
Blackstripe Cory Corydoras bondi No Image.png Moderate 2 in5.08 cm 20 USGallon75.708 liters
75,708.236 mL
Breei Cory Corydoras breei No Image.png Moderate 1.8 in4.572 cm 15 USGallon56.781 liters
56,781.177 mL
Bronze Cory Corydoras aeneus Corydoras aeneus.jpg Easy 2.756 in7 cm 20 USGallon75.708 liters
75,708.236 mL
Burgess' Cory Corydoras burgessi No Image.png Moderate 2.2 in5.588 cm 20 USGallon75.708 liters
75,708.236 mL
Colicana Cory Corydoras incolicana No Image.png Moderate 3.2 in8.128 cm 30 USGallon113.562 liters
113,562.353 mL
Copei Cory Corydoras copei No Image.png Moderate 2 in5.08 cm 15 USGallon56.781 liters
56,781.177 mL
Delphax Cory Corydoras delphax Corydoras delphax.jpg Moderate 2.8 in7.112 cm 20 USGallon75.708 liters
75,708.236 mL
Diphyes Cory Corydoras diphyes No Image.png Moderate 2 in5.08 cm 15 USGallon56.781 liters
56,781.177 mL
Dusky Corydoras Corydoras septentrionalis No Image.png Moderate 2.5 in6.35 cm 20 USGallon75.708 liters
75,708.236 mL
Ehrhard's Cory Corydoras ehrhardti No Image.png Moderate 2.2 in5.588 cm 20 USGallon75.708 liters
75,708.236 mL
Elegant Cory Corydoras elegans Three corydorus elegans close up.JPG Moderate 2.2 in5.588 cm 20 USGallon75.708 liters
75,708.236 mL
Ephippifer Cory Corydoras ephippifer No Image.png Moderate 2.6 in6.604 cm 20 USGallon75.708 liters
75,708.236 mL
Fairy Corydoras Corydoras atropersonatus No Image.png Moderate 2 in5.08 cm 20 USGallon75.708 liters
75,708.236 mL
False Bandit Cory Corydoras melini Corydoras melini.jpg Moderate 1.8 in4.572 cm 20 USGallon75.708 liters
75,708.236 mL
False Network Cory Corydoras sodalis No Image.png Moderate 2.4 in6.096 cm 20 USGallon75.708 liters
75,708.236 mL
Flag-Tailed Corydoras Corydoras robineae No Image.png Moderate 2.8 in7.112 cm 30 USGallon113.562 liters
113,562.353 mL
Flag-Tailed Panda Cory Corydoras oiapoquensis No Image.png Moderate 2.2 in5.588 cm 20 USGallon75.708 liters
75,708.236 mL
Fowler's Cory Corydoras fowleri Corydoras-fowleri.jpg Moderate 2.8 in7.112 cm 30 USGallon113.562 liters
113,562.353 mL
Garbei Cory Corydoras garbei No Image.png Moderate 2 in5.08 cm 15 USGallon56.781 liters
56,781.177 mL
Geryi Cory Corydoras geryi No Image.png Moderate 2.8 in7.112 cm 30 USGallon113.562 liters
113,562.353 mL
Gomez Cory Corydoras gomezi No Image.png Moderate 2.4 in6.096 cm 20 USGallon75.708 liters
75,708.236 mL
Gray Cory Corydoras griseus No Image.png Moderate 2 in5.08 cm 20 USGallon75.708 liters
75,708.236 mL
Green-Gold Cory Corydoras melanotaenia Corydoras melanotaenia.jpg Moderate 2.4 in6.096 cm 20 USGallon75.708 liters
75,708.236 mL
Guapore Cory Corydoras guapore No Image.png Moderate 2 in5.08 cm 20 USGallon75.708 liters
75,708.236 mL
Imitator Cory Corydoras imitator No Image.png Moderate 2.6 in6.604 cm 20 USGallon75.708 liters
75,708.236 mL
Leopard Cory Corydoras trilineatus Corydora Trilineatus-9773.jpg Moderate 2 in5.08 cm 20 USGallon75.708 liters
75,708.236 mL
Leopard Cory Corydoras julii Corydoras julii1.jpg Moderate 2.5 in6.35 cm 20 USGallon75.708 liters
75,708.236 mL
Leopard Cory Corydoras leopardus No Image.png Moderate 3 in7.62 cm 20 USGallon75.708 liters
75,708.236 mL
Long-Finned Corydora Corydoras longipinnis No Image.png Moderate 3 in7.62 cm 20 USGallon75.708 liters
75,708.236 mL
Long-Nosed Skunk Cory Corydoras narcissus Corydoras narcissus9184.jpg Moderate 3 in7.62 cm 55 USGallon208.198 liters
208,197.648 mL
Long-Nosed Smudge Spot Cory Corydoras ourastigma No Image.png Moderate 2.6 in6.604 cm 20 USGallon75.708 liters
75,708.236 mL
Loreto Cory Corydoras loretoensis No Image.png Moderate 2 in5.08 cm 20 USGallon75.708 liters
75,708.236 mL
Loreto Panda Cory Corydoras ortegai Corydoras ortegai9938.jpg Moderate 1.6 in4.064 cm 20 USGallon75.708 liters
75,708.236 mL
Loxozonus Cory Corydoras loxozonus Corydoras-loxozonus.jpg Moderate 2.2 in5.588 cm 20 USGallon75.708 liters
75,708.236 mL
Many-Spotted Cory Corydoras polystictus No Image.png Easy 2 in5.08 cm 20 USGallon75.708 liters
75,708.236 mL
Millenium Cory Corydoras spectabilis No Image.png Moderate 2.8 in7.112 cm 30 USGallon113.562 liters
113,562.353 mL
Mosiac Cory Corydoras haraldschultzi Corydoras haraldschultzi.jpg Moderate 3.4 in8.636 cm 30 USGallon113.562 liters
113,562.353 mL
Napo Cory Corydoras napoensis No Image.png Moderate 2 in5.08 cm 20 USGallon75.708 liters
75,708.236 mL
Natterer's Cory Corydoras nattereri No Image.png Moderate 2.6 in6.604 cm 20 USGallon75.708 liters
75,708.236 mL
Nijssen's Cory Corydoras nijsseni No Image.png Moderate 2 in5.08 cm 20 USGallon75.708 liters
75,708.236 mL
Olga Cory Corydoras simulatus No Image.png Moderate 2.8 in7.112 cm 30 USGallon113.562 liters
113,562.353 mL
Ornate Cory Corydoras ornatus No Image.png Moderate 2.8 in7.112 cm 20 USGallon75.708 liters
75,708.236 mL
Panda Corydoras Corydoras panda Panda cory.jpg Moderate 2 in5.08 cm 20 USGallon75.708 liters
75,708.236 mL
Pantana Cory Corydoras pantanalensis Corydoras pantanalensis.jpg Moderate 3.2 in8.128 cm 30 USGallon113.562 liters
113,562.353 mL
Pastaza Cory Corydoras pastazensis No Image.png Moderate 2.8 in7.112 cm 30 USGallon113.562 liters
113,562.353 mL
Peppered Cory Corydoras paleatus Pepperedcory.jpg Moderate 3 in7.62 cm 20 USGallon75.708 liters
75,708.236 mL
Peru Black Cory Corydoras semiaquilus Corydoras semiaquilus5839.jpg Moderate 3.2 in8.128 cm 30 USGallon113.562 liters
113,562.353 mL
Pinheiroi Cory Corydoras pinheiroi No Image.png Moderate 2.6 in6.604 cm 20 USGallon75.708 liters
75,708.236 mL
Pretty Cory Corydoras pulcher No Image.png Moderate 2.6 in6.604 cm 20 USGallon75.708 liters
75,708.236 mL
Pygmy Cory Corydoras pygmaeus Corydoras pygmaeus-6746.jpg Moderate 1.3 in3.302 cm 15 USGallon56.781 liters
56,781.177 mL
Rabaut's Cory Corydoras rabauti Corydoras rabauti.jpg Moderate 2.2 in5.588 cm 20 USGallon75.708 liters
75,708.236 mL
Reticulated Cory Corydoras reticulatus Reticulatus2805es.jpg Moderate 2.4 in6.096 cm 20 USGallon75.708 liters
75,708.236 mL
Reynold's Cory Corydoras reynoldsi No Image.png Moderate 1.26 in3.2 cm 15 USGallon56.781 liters
56,781.177 mL
Robust Cory Corydoras robustus No Image.png Moderate 3.8 in9.652 cm 40 USGallon151.416 liters
151,416.471 mL
Sailfin Brochis Brochis splendens Brochis splendens345.jpg Easy 25 in63.5 cm 25 USGallon94.635 liters
94,635.295 mL
San Juan Cory Corydoras bilineatus No Image.png Moderate 1.75 in4.445 cm 15 USGallon56.781 liters
56,781.177 mL
Sand's Cory Corydoras davidsandsi Corydoras davidsandsi3453.jpg Moderate 2.4 in6.096 cm 20 USGallon75.708 liters
75,708.236 mL
Sangama Cory Corydoras virginiae No Image.png Moderate 2.4 in6.096 cm 20 USGallon75.708 liters
75,708.236 mL
Santa Cruz Cory Corydoras cruziensis No Image.png Moderate 2 in5.08 cm 15 USGallon56.781 liters
56,781.177 mL
Schwartz's Cory Corydoras schwartzi Corydoras schwartzi1.jpg Moderate 2 in5.08 cm 20 USGallon75.708 liters
75,708.236 mL
Slate Cory Corydoras concolor No Image.png Moderate 2.4 in6.096 cm 20 USGallon75.708 liters
75,708.236 mL
Smokey Cory Corydoras gossei No Image.png Moderate 2.4 in6.096 cm 20 USGallon75.708 liters
75,708.236 mL
Smudge Spot Cory Corydoras similis No Image.png Moderate 2.4 in6.096 cm 20 USGallon75.708 liters
75,708.236 mL
Spotted Cory Corydoras agassizii Corydoras agassizii-3551.jpg Moderate 2.8 in7.112 cm 20 USGallon75.708 liters
75,708.236 mL
Spotted Corydoras Corydoras ambiacus No Image.png Moderate 2.4 in6.096 cm 15 USGallon56.781 liters
56,781.177 mL
Spotty Cory Corydoras brevirostris No Image.png Moderate 2.4 in6.096 cm 20 USGallon75.708 liters
75,708.236 mL
Sterba's Corydoras Corydoras sterbai Corydoras sterbai 01.jpg Easy 2.6 in6.604 cm 20 USGallon75.708 liters
75,708.236 mL
Suessi Cory Corydoras seussi No Image.png Moderate 2.8 in7.112 cm 20 USGallon75.708 liters
75,708.236 mL
Tail Spot Pygmy Cory Corydoras hastatus Corydoras hastatus.jpg Moderate 1.5 in3.81 cm 15 USGallon56.781 liters
56,781.177 mL
Tail-Spot Corydoras Corydoras caudimaculatus No Image.png Moderate 2 in5.08 cm 15 USGallon56.781 liters
56,781.177 mL
Two Saddle Cory Corydoras weitzmani No Image.png Moderate 2.2 in5.588 cm 20 USGallon75.708 liters
75,708.236 mL
Venezuelan Pygmy Cory Corydoras habrosus Habrosus4.jpg Moderate 1.4 in3.556 cm 15 USGallon56.781 liters
56,781.177 mL
Xingu Cory Corydoras xinguensis No Image.png Moderate 2 in5.08 cm 20 USGallon75.708 liters
75,708.236 mL
Zygus Cory Corydoras zygatus Corydoras zygatus.jpg Moderate 2.8 in7.112 cm 30 USGallon113.562 liters
113,562.353 mL

Pages in category "Corydoras"

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