Smudge Spot Corydoras (Corydoras similis)
The Smudge Spot Corydoras (Corydoras similis) is a beautiful and peaceful freshwater catfish known for its shimmering silver-blue body and distinctive dark "smudge" marking near the base of its tail. This attractive Corydoras species combines subtle iridescent coloration with the active, social behavior that makes Cory catfish so popular among aquarium hobbyists.
Native to the Amazon Basin of Brazil, Corydoras similis are gentle bottom dwellers that thrive in groups and spend their days exploring the substrate for food. Their compact size, peaceful nature, and compatibility with shrimp and small community fish make them an excellent choice for planted aquariums and peaceful freshwater setups.
Hardy, active, and beginner-friendly, Smudge Spot Corys add personality and constant movement to the lower levels of the aquarium.
Quick Facts
- Scientific Name: Corydoras similis
- Common Names: Smudge Spot Cory, Similis Cory
- Adult Size: 1.5–2 inches
- Temperament: Peaceful
- Care Level: Easy
- Diet: Omnivore
- Lifespan: 5–8 years
- Minimum Tank Size: 15–20 gallons
- Water Temperature: 72–80°F
- pH Range: 6.0–7.5
- Swimming Level: Bottom Dweller
- Schooling Fish: Yes
Why Choose Smudge Spot Corydoras?
✔ Unique dark "smudge" marking near the tail
✔ Attractive silver-blue iridescent coloration
✔ Peaceful community fish
✔ Excellent for planted aquariums
✔ Shrimp and snail safe
✔ Beginner friendly and hardy
Aquarium Setup
Smudge Spot Corydoras thrive in mature aquariums with soft substrate, clean water, and plenty of cover.
Recommended setup:
- 15–20 gallons minimum
- Fine sand or smooth gravel
- Live plants
- Driftwood and caves
- Gentle water flow
- Stable water parameters
- Groups of 6 or more
Fine sand is highly recommended because it protects their sensitive barbels and encourages natural foraging behavior.
Diet & Feeding
Corydoras similis are omnivores and readily accept:
- Sinking pellets
- Corydoras wafers
- Frozen bloodworms
- Brine shrimp
- Daphnia
- Live foods
- Quality sinking foods
Although they help clean up leftover food, they should be fed directly to ensure proper nutrition.
Tank Mates
Smudge Spot Corydoras do well with:
- Tetras
- Rasboras
- Guppies
- Endlers
- Honey Gouramis
- Shrimp
- Mystery Snails
- Otocinclus
- Other Corydoras species
Avoid aggressive fish and large predatory species.
Schooling Behavior
Smudge Spot Corydoras are highly social fish and should always be kept in groups.
Recommended group sizes:
- Minimum: 6 fish
- Ideal: 8–12+ fish
Larger groups encourage natural behavior and help reduce stress.
Frequently Asked Questions
Can I keep just one Corydoras similis?
No. They are schooling fish and should be kept in groups of at least six for proper social behavior.
Do Smudge Spot Corydoras clean the tank?
They help consume leftover food but should not be relied upon as the sole cleaning crew.
Are they sensitive to water conditions?
They prefer clean, well-oxygenated water and stable parameters but are generally hardy when properly cared for.
Are Smudge Spot Corydoras safe with shrimp?
Yes. They are completely peaceful and safe with shrimp, snails, and other small community fish.
What substrate is best for Corydoras similis?
Fine sand is ideal because it protects their delicate barbels while they forage.
Available at Tropical Treasures Wyo
Shop healthy Smudge Spot Corydoras (Corydoras similis) at Tropical Treasures Wyo in Cheyenne, Wyoming. These peaceful freshwater catfish are perfect for planted aquariums, nano community tanks, shrimp setups, and hobbyists looking for a unique Corydoras species.
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