Corydoras ornatus PDF Print E-mail
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General information – The Ornate cory or by its scientific name

Corydoras ornatus is a beautiful but not yet appreciate fish from the

Corydoradinae subfamily.Like all Corydoras species, this species can

diffuse oxygen using the posterior part of the gut, so swimming up to

the surface and gasping for air, then immediately diving back to the

bottom, it is normal and should not be considered as a sign of fault.

It also, like other Corydoras species, tend to "wink" by rolling it's eyes

downwards, a characteristic considered as funny and makes these

fish more loveable.   

Common Name – Ornate cory 

Scientific Name - Corydoras ornatus 

Family - Callichthyidae (subfamily: Corydoradinae) 

Origin - South America, at the river basin in Brazil 

Corydoras ornatus (Ornate cory)

SizeUp to 5 - 6 cm (1.97 - 2.36 in) 

First discovered - Nijssen & Isbrücker, 1976 

Nutrition - Carnivore feeds mostly on invertebrates such as worms and insect larvae. Will accept

prepared industrial foods such as pellets, frozen foods and catfish wafers  

Behavior – Peaceful 

Maintenance and care - These fish should be kept in an aquarium with a sandy bottom, mild water

movement and efficient biological filtration system. The aquarium should be planted sparsely and other

fish companions should be calm and non-aggressive.  

Water Parameters – Temperature: 74F – 79F (23C-26C), PH: 6-8, DGH: 2-25 

Breeding - Like all Corydoras species, this one also, starts breeding at the onset of the rainy season.

The breeding setup should be about 10-20L (2.64-5.28 gallons), with a sponge filter operated by an air-

pump and a thin layer of sand substrate or no substrate at all. These fish breed in groups containing

one female and several males, mainly because any other female will eat the eggs of another female. 

The breeders should be fed on live and frozen foods for a month or so, to get them into breeding condition

(especially the females, who has to build up eggs) .When moving the fish to the breeding aquarium, the

water temperature should be about 26oC (78.8oF).  Water level should be lowered for about 5 days, then

at day 6, pouring new water, about 2-4oC less than aquarium water.  Lowering the water temperature

usually triggers courting, as it is a sign to the beginning of the rainy season. All males will chase the

female, usually one or two will get to mate with her.  Mating occurs as the male swims in front of the f

emale, clasping her mouth with his Pelvic fins, this is known as the famous "T position". 

After the male releasing the female, she will form a pouch of her pelvic fins, into which she will lay her

eggs.  Afterwards the female will swim throughout the aquarium searching for a suitable location to place

the eggs; this is usually the glass of the aquarium next to the surface. Once the location is found, she

will press her abdomen to the substrate and open her Pelvic-fin's pouch, sticking her 3-4 eggs to the

substrate and swimming away. Once breeding is over, the parents should be moved to their former

residence.  Some breeders leave the eggs as they are, others add Methylene-blue or other anti- 

Fungicides to the water, others prefer to remove the eggs.  The eggs hatch after 5 days in 26oC (78.8oF)

and on the 6-7th day should be feed with Microworms and Artemia Nauplii.