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No federal permit to keep

Petracini's cory

Corydoras petracinii

Fishes › Catfish (Siluriformes) › Callichthyidae (Corydoras and armored catfish)

Care follows the corydoras and armored catfish guide below.

Aquarium hobby
Experience: Beginner
FamilyCorydoras and armored catfish
Adult lengthup to 1.5 in
WaterFreshwater

Care at a glance

Species-specific aquarium care

  • Water: Freshwater.
  • Layout: Uses both the bottom and open water: give open swimming space plus cover near the substrate.

Calculated from this species' own FishBase record: tank size from its typical adult length and swimming zone, water values from its recorded ranges. The group guide below fills in general care.

Care guide

Species care notes

  • Tank: a base of at least 24 × 12 in (roughly 14 US gallons); space needed is rated “modest tank”.
  • Water: a fairly wide range, from slightly acidic to slightly alkaline, 50–68 °F, pH 7–8, 10–20 dGH.
  • Behaviour: a shoaling fish best kept in a group of six or more; suited to a community tank.
  • Difficulty: Moderate (Seriously Fish rating).

Short excerpts from the species profile:

  • Setup: “Ideally use a substrate of fine sand, although rounded gravel is an acceptable alternative provided that it is kept scrupulously clean.”

From the Seriously Fish profile for this species, which has the full habitat, maintenance, diet, behaviour and breeding write-up 167

Group care guide

Corydoras and armored catfish

Applies to most species in this group. Habitat: Shallow South American streams. Individual species can differ, so compare with the species numbers above and the linked sources.

Housing & setup

  • Soft sand substrate, groups of six or more, and clean water.

Sources 117119164118

Diet

  • Sinking pellets, wafers and frozen bloodworms.

Sources 117119164118

Social life

  • Keep in groups.

Sources 117119164118

Health watch

  • Barbel erosion on dirty or rough substrate.

Sources 117119164118

Understanding the animal

This species is part of a group that hobbyists, aviculturists or zoos keep widely (Corydoras and armored catfish), so it's included for completeness. It may be rare in captivity itself, or not kept at all. Use the group guide as a starting point and look for species-specific advice from experienced keepers.
In the wild

In the wild

From this species’ own FishBase record (habitat, bottom type, water and breeding data), not its family. Good care copies these conditions.1

Where it livesLives in freshwater. Uses both the bottom and open water.
Water it lives inFreshwater.
ClimateTropical climate.
  1. FishBase species summary: Corydoras petracinii
From the sources

From the sources

Quoted from the matching sections of reputable sources for this exact species. Specialist databases are used first; Wikipedia (community-edited, CC BY-SA 4.0) only fills gaps. Other sources are short credited quotes.

Where it livesHome ranges Population dynamics Growth parameters Max. ages / sizes Length-weight rel. Length-frequencies Mass conversion Recruitment Abundance Life cycle Reproduction Maturity Maturity/Gills rel. — FishBase

Data and studies

The numbers

The numbers

Each bar is what one source reports. Where several sources weigh in, the dashed gold band marks their average.

Water temperature

Reported50–68°F
Seriously Fish species profiles 16750–68

Range the species tolerates; aim for the middle.

pH

Reported7–8
Seriously Fish species profiles 1677–8

Water hardness

Reported10–20dGH
Seriously Fish species profiles 16710–20

Adult length

Reported1.5in
Seriously Fish species profiles 1671.5

Minimum tank footprint

Reported24in
Seriously Fish species profiles 16724

Seriously Fish recommends a tank base of at least 24 × 12 in (about 14 US gallons).

Sources for this sheet

  1. Seriously Fish species profiles Experienced keeper or breederLong-running aquarium reference written and peer-checked by experienced fishkeepers and ichthyologists; each profile covers habitat, tank size, water, diet, behaviour and breeding.
  2. Merck Veterinary Manual: Management of aquarium fish Zoo, university or veterinaryThe Merck Veterinary Manual: a standard veterinary reference written and reviewed by veterinary specialists.
  3. Merck Veterinary Manual: Types and features of aquatic systems Zoo, university or veterinaryThe Merck Veterinary Manual: a standard veterinary reference written and reviewed by veterinary specialists.
  4. FishBase (Froese & Pauly, eds.), version 24.07 Peer-reviewed researchThe global scientific database on fishes, maintained by a consortium of research institutions; every value is referenced.
  5. Merck Veterinary Manual: Nutritional diseases of fish Zoo, university or veterinaryThe Merck Veterinary Manual: a standard veterinary reference written and reviewed by veterinary specialists.