Corydoras multiradiatus
Share:
Corydoras multiradiatus Care Guide
(Many-Rayed Corydoras)
Corydoras multiradiatus, also known as the Many-Rayed Corydoras, is a large, peaceful catfish species native to freshwater habitats in South America, particularly in Ecuador and Peru. Its name refers to the numerous rays on its dorsal fin, a distinctive feature of the species. This cory is less commonly seen in the aquarium trade but is prized for its size and unique appearance.
Tank Requirements
- Tank Size:
- Minimum 30 gallons for a small group. Due to its larger size compared to other Corydoras species, a larger tank (40–50 gallons) is recommended for groups of 4–6 individuals.
- Tank Setup:
- Substrate: Fine sand is essential to protect their sensitive barbels. Avoid sharp gravel.
- Decor: Incorporate smooth rocks, driftwood, and leaf litter to create a natural environment and provide hiding spots.
- Plants: Use hardy plants such as Anubias, Java fern, or Amazon swords to add cover and enhance the aesthetics.
- Lighting: Moderate lighting; dim or shaded areas help reduce stress.
- Water Flow:
- Low to moderate water movement is preferred. A gentle filtration system like a sponge or canister filter works well.
Water Parameters
- Temperature: 72–78°F (22–26°C)
- pH: 6.0–7.5 (slightly acidic to neutral)
- Hardness: 2–15 dGH (soft to moderately hard water)
- Ammonia/Nitrite: 0 ppm; nitrates should be kept below 20 ppm.
- Water Changes: Perform weekly water changes of 25–30% to maintain optimal water quality.
Diet
As an omnivore, Corydoras multiradiatus thrives on a varied diet:
- Staple Foods:
- High-quality sinking pellets or wafers designed for catfish and bottom feeders.
- Live/Frozen Foods:
- Bloodworms, brine shrimp, blackworms, and daphnia provide essential protein.
- Vegetable Matter:
- Blanched zucchini, cucumber, and peas can be offered occasionally.
- Feeding Schedule:
- Feed 1–2 times daily, providing only as much as they can consume in a few minutes.
Behavior and Compatibility
- Temperament:
- Peaceful and social, they are best kept in groups of 4–6 or more. They exhibit natural schooling behaviors when kept in appropriate numbers.
- Tankmates:
- Compatible with peaceful community fish such as tetras, rasboras, gouramis, and other Corydoras species.
- Avoid overly aggressive or large predatory fish that may stress or harm them.
Breeding
Breeding Corydoras multiradiatus in captivity is possible but requires specific conditions:
- Breeding Tank:
- Set up a dedicated breeding tank with soft, slightly acidic water (pH 6.0–6.5) and a temperature of 75–77°F (24–25°C).
- Include fine-leaved plants or spawning mops for egg deposition.
- Conditioning:
- Feed adults a protein-rich diet, including live or frozen foods, to encourage spawning.
- Spawning Behavior:
- Males will court females in a “T-position” for fertilization. Females attach the eggs to smooth surfaces like glass, leaves, or decor.
- Egg and Fry Care:
- Remove adults after spawning to prevent them from eating the eggs.
- Eggs hatch in 3–5 days, and fry become free-swimming within a week.
- Feed fry infusoria or freshly hatched brine shrimp, transitioning to finely crushed flakes or micro-pellets as they grow.
Common Challenges
- Size Considerations:
- Being one of the larger Corydoras species, C. multiradiatus requires a spacious tank. Ensure your setup can accommodate their adult size (up to 3.5–4 inches).
- Substrate Health:
- Proper substrate is critical to prevent barbel damage and infection. Always use fine sand and ensure the substrate is kept clean.
- Water Quality:
- Like other Corydoras, they are sensitive to poor water conditions. Regular maintenance is essential for their health.
Interesting Facts
- The “multiradiatus” name highlights the numerous rays on its dorsal fin, a unique trait among Corydoras species.
- They are one of the larger Corydoras species, making them a standout in community tanks.
- Like other Corydoras, they can gulp air from the surface, using their intestinal lining to extract oxygen, a behavior useful in low-oxygen environments.
Care Summary
| Aspect | Details |
|---|---|
| Tank Size | 30–50 gallons for groups of 4–6 or more |
| Water Parameters | pH 6.0–7.5, 72–78°F, soft to moderately hard water |
| Diet | Omnivorous: sinking pellets, live/frozen foods, vegetables |
| Temperament | Peaceful, social, best in groups |
| Lifespan | 8–10 years |
Corydoras multiradiatus is a striking addition to larger community aquariums. With proper care and attention to their specific needs, they will thrive, displaying their natural behaviors and unique beauty.
