Overview

Comprehensive Description

Biology

Feeds on worms, crustaceans, insects and plant matter (Ref. 7020). Oviparous (Ref. 205).
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Distribution

South America: Lower Amazon River and coastal rivers in northeastern Brazil.
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Lower Amazon River basin and coastal rivers of northeastern Brazil.
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Physical Description

Size

Maximum size: 60 mm ---
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Max. size

5.2 cm SL (male/unsexed; (Ref. 37395))
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Ecology

Habitat

Environment

demersal; freshwater; pH range: 6.0 - 8.0; dH range: 2 - 25
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Trophic Strategy

Feeds on worms, crustaceans, insects and plant matter.
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Diseases and Parasites

Metacercaria Infection (Flatworms). Parasitic infestations (protozoa, worms, etc.)
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Internal Worm Infection (general). Parasitic infestations (protozoa, worms, etc.)
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Bacterial Infections (general). Bacterial diseases
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Life History and Behavior

Life Cycle

Oviparous (Ref. 205). Breeding takes place in swamps, ponds, or streams (Ref. 205).
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Corydoras julii

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 3
Species With Barcodes: 1
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Conservation

Threats

Not Evaluated
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: of no interest; aquarium: highly commercial
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Wikipedia

Corydoras julii


Corydoras julii (also known as the Julii Cory) is a member of the Corydoras family. Corys are small, bottom dwelling scavenger catfish that are loved by aquarium keepers for their looks, personalities, and bottom cleaning skills.

Keeping[edit]

Julii Corys are peaceful fish and will do well in a community aquarium with other community fish. They need to be in groups or "shoals" of four or more of the same species as they like to swim in schools and stay together mostly all the time. A small shoal should be kept in at least a 20 gallon tank.

Physical Appearance[edit]

Julii Corys are one of the most commonly sought corys because of their beautifully patterned bodies. Their flesh is a whitish-gray, almost transparent color with fine black spotting all over. A Julii Cory can be distinguished from other similar 'spotted' corys by the fine spotting pattern and also their black mark on their dorsal fin; similar species have either larger spots or spots merged into short wavy lines. They grow to less than 2.5 inches long, making them one of the smaller members of the cory family. They are rarely available commercially; fish labelled as "Julii corys" are often misidentified (C. leopardus), or Three-stripe ("False Julii") cory cats (C. trilineatus).

Feeding[edit]

Julii Corys are scavengers and omnivores that will eat food that sinks to the bottom of the tank. They should be given high quality sinking pellets to ensure proper nutrition but will also eat flake food that falls to the bottom. Frozen Blood worms and brine shrimp should be given as a treat; Also live blood worms are a favorite.

Breeding[edit]

Sexing corys is not very difficult provided they are in well fed and in good condition. Females are quite a bit rounder than males. Usually Cory catfish are bred in groups of 2 males to 1 female. They can also be bred in a large group.

The breeding tank should be well planted with live or fake plants. Put fine gravel or sand on the bottom. To bring them into breeding mode imitate their natural water chemistry and do water changes to gradually change the water temperature.

Feed them well with nutritious foods such as bloodworm, tubifix worms and quality catfish wafers. Syphon out uneaten food when doing water changes to keep the water pristine.

Corys are egg laying fish and will lay white, sticky eggs on all surfaces in the aquarium, often on the glass itself. Females lay many eggs at a time though, the catfish will eat most of the eggs unless removed. Move eggs to another tank for hatching and raising, or remove the parents from the tank.

References[edit]

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