CW009 Green Laser Cory Catfish – Corydoras sp. CW009

The CW009 Green Laser Cory Catfish (Corydoras sp. CW009) is one of the most visually impressive members of the Laser Cory group. Its defining feature is an intense metallic emerald-green stripe extending across the upper body from behind the head toward the tail.

Also known as the Green Laser Cory, Peru Green Stripe Cory, or CW009 Cory, this specialty freshwater catfish combines brilliant reflective coloration with the peaceful and social personality Cory keepers enjoy.

Under aquarium lighting, the laser stripe can shift between emerald green, turquoise-green, blue-green, and green-gold depending on the individual fish, viewing angle, substrate, and lighting. A group moving together across the aquarium floor can create an especially impressive display.

Taxonomy note: CW009 remains an undescribed Cory-type catfish identified by its CW number rather than a formally published species name. It has traditionally been sold as Corydoras sp. CW009. Following the modern reclassification of Corydoradinae, this lineage is now placed within Osteogaster and may be listed as Osteogaster sp. CW009. The Corydoras name remains widely used throughout the aquarium trade.

CW009 Green Laser Cory Catfish Care Information

What Does a CW009 Green Laser Cory Look Like?

The defining characteristic of the CW009 Green Laser Cory is the highly reflective metallic stripe running along the upper portion of the body.

In good condition, this stripe can appear emerald green, electric green, turquoise, or blue-green. The color can change slightly with the viewing angle because much of the visual effect comes from iridescent light reflection.

Beneath the bright stripe, the body usually displays olive, bronze, gray-green, or darker metallic coloration. These subdued body tones create dramatic contrast with the brilliant upper stripe.

When several CW009 Corys move together across a dark substrate or among green aquarium plants, their reflective stripes can create a glowing effect that makes this fish especially attractive in display aquariums.

Why Is CW009 Called the Green Laser Cory?

The name Green Laser Cory comes from the intense metallic-green stripe extending along the dorsal area of the fish. Under aquarium lighting, the reflective stripe can appear to glow, producing the “laser” effect responsible for the common name.

The CW009 form is also sometimes called the Peru Green Stripe Cory, referencing both its coloration and Peruvian origin.

Is the CW009 Green Laser Cory Rare or Exotic?

The CW009 Green Laser Cory is considered a specialty collector fish in the Cory hobby and is generally less commonly encountered than mainstream species such as Panda, Bronze, Peppered, or Albino Corys.

CW009 has been maintained and bred in captivity for many years, and both wild-origin and captive-bred fish have entered the aquarium trade. Availability can still vary significantly depending on breeder production and imports.

The term “rare” in the aquarium trade generally refers to its specialty availability and collector appeal and should not be interpreted by itself as a statement about conservation status in the wild.

CW009 Green Laser Cory vs. CW010 Gold Laser Cory

The CW009 Green Laser Cory and CW010 Gold Laser Cory are closely associated within the aquarium hobby and can appear surprisingly similar under certain lighting.

CW009 is typically characterized by a stronger metallic green or blue-green laser stripe, while CW010 generally shows a more solid yellow, gold, or orange stripe.

Juvenile fish can be particularly difficult to distinguish, and aquarium lighting can dramatically change how the stripe appears. Maintaining the correct CW number is therefore especially useful for collectors and breeders.

Green Laser Cory Color Variations

CW009 has shown interesting color variation within captive breeding lines. In addition to the classic bright green phenotype, aquarists have reported individuals with stronger blue-green or bluish metallic coloration.

These variations are one reason CW009 remains especially interesting to Cory breeders and collectors. Individual fish should be expected to vary somewhat rather than displaying an identical shade of green.

CW009 Green Laser Cory Behavior & Group Size

Green Laser Corys are peaceful, social bottom-dwelling fish and should not be kept alone. We recommend maintaining at least 6 CW009 Green Laser Cory Catfish together.

In a proper group, they can often be seen exploring the aquarium floor, searching the substrate for food, resting near one another, and moving together as a loose school.

Larger groups can create an especially attractive display because multiple metallic green stripes become visible as the fish move together through planted and open areas of the aquarium.

Like other Cory-type catfish, Green Laser Corys may occasionally make a quick trip to the water surface to gulp atmospheric air before returning to the bottom. Occasional surface visits are normal Cory behavior.

Ideal Aquarium Setup for CW009 Green Laser Corys

A 20-gallon or larger freshwater aquarium provides a practical starting point for a proper group of Green Laser Corys. A longer aquarium footprint is particularly useful because these fish spend significant time moving and foraging along the bottom.

A fine sand substrate or smooth rounded fine gravel is recommended. CW009 Corys use sensitive barbels around their mouths while searching for food, so sharp or abrasive materials should be avoided.

Live plants, driftwood, smooth rocks, leaf litter, and shaded areas can provide security and create a natural-looking environment. Leave open areas of substrate where the group can comfortably forage together.

Darker backgrounds and natural-colored substrate can also help create visual contrast with the brilliant metallic green stripe.

CW009 Green Laser Cory Water Parameters

CW009 Green Laser Cory Catfish generally do well at temperatures around 71–79°F (22–26°C) with a pH of approximately 6.5–7.2.

This Cory may benefit from conditions toward the cooler end of the typical tropical aquarium range. Always select tank mates with overlapping temperature requirements.

More important than constantly changing water chemistry is maintaining a stable, fully cycled aquarium with clean water, appropriate filtration, good oxygenation, and regular water changes.

Ammonia and nitrite should remain at zero, and sudden changes in temperature or water chemistry should be avoided. Keeping the aquarium floor clean is also important because Corys spend significant amounts of time directly on the substrate.

What Do CW009 Green Laser Cory Catfish Eat?

Green Laser Corys are omnivorous foragers and should receive a varied, nutritious diet rather than surviving only on leftovers from other aquarium fish.

High-quality sinking pellets, tablets, and wafers can form the foundation of their diet. Supplement prepared foods with appropriately sized frozen or live foods such as bloodworms, brine shrimp, daphnia, Tubifex, and similar nutritious foods.

A varied diet combined with stable water conditions can help support healthy growth, body condition, activity, and natural metallic coloration.

CW009 Green Laser Cory Tank Mates

The peaceful temperament of the CW009 Green Laser Cory Catfish makes it suitable for many freshwater community aquariums.

Potential tank mates may include peaceful tetras, rasboras, danios, peaceful livebearers, small peaceful gouramis, compatible dwarf cichlids, other suitable Cory-type catfish, and other non-aggressive freshwater fish with overlapping water requirements.

Avoid large predatory species, aggressive bottom dwellers, and highly competitive fish that may intimidate the Corys or prevent them from receiving enough food.

Why Choose CW009 Green Laser Cory Catfish?

• Brilliant metallic emerald-green laser stripe
• Specialty CW-number collector Cory
• Beautiful olive, bronze, and green body coloration
• Peaceful temperament for community aquariums
• Active and entertaining bottom-dwelling behavior
• Excellent choice for planted freshwater aquariums
• Social behavior when maintained in a proper group
• Distinctive alternative to Gold Laser and standard Cory species
• Available in both wild-origin and captive-bred lines within the hobby

CW009 Green Laser Cory Catfish FAQ

What is a CW009 Green Laser Cory Catfish?

CW009 Green Laser Cory is an undescribed Cory-type catfish from Peru recognized by the brilliant metallic green stripe running along its upper body. It has traditionally been sold as Corydoras sp. CW009 and is now placed within the genus Osteogaster.

What does CW009 mean?

CW009 is an identification code used within the Cory hobby for this undescribed fish. CW numbers allow aquarists, breeders, and specialists to distinguish individual Cory forms before they receive formal scientific species names.

Is Corydoras sp. CW009 now Osteogaster sp. CW009?

Yes. Following the modern reclassification of Corydoradinae, CW009 is placed within the genus Osteogaster and may therefore be listed as Osteogaster sp. CW009. The name Corydoras sp. CW009 remains widely used throughout the aquarium trade.

Why is CW009 called the Green Laser Cory?

The common name comes from the brilliant reflective green stripe running along the upper body. Under aquarium lighting, this stripe can appear to glow like a metallic laser line.

Is the CW009 Green Laser Cory rare?

CW009 is considered a specialty collector Cory and is generally less commonly available than standard Panda, Bronze, Albino, or Peppered Corys. Both wild-origin and captive-bred Green Laser Corys occur in the aquarium trade, but availability can vary.

How big do CW009 Green Laser Corys get?

Adult male CW009 Green Laser Corys can reach approximately 2.5 inches, while mature females may reach around 2.75 inches and usually develop a fuller body shape.

How many Green Laser Corys should be kept together?

Keep CW009 Green Laser Corys in a group of at least 6 fish. A proper group helps encourage more confident, visible, and natural social behavior.

What temperature is best for CW009 Green Laser Corys?

A practical aquarium temperature range for CW009 Green Laser Corys is approximately 71–79°F (22–26°C). They may benefit from conditions toward the cooler end of the tropical aquarium range.

What is the difference between CW009 Green Laser and CW010 Gold Laser Corys?

CW009 typically displays a stronger metallic green or blue-green stripe, while CW010 usually has a yellow, gold, or orange laser stripe. Juveniles and fish viewed under different lighting can look similar, so the CW identification number remains important for accurate identification.

Are there Blue Laser forms of CW009?

Captive breeding of CW009 has produced color variation, including fish described within the hobby as Blue Laser forms. These fish are associated with the CW009 Green Laser lineage but display stronger blue or blue-green iridescence.

Where do CW009 Green Laser Corys come from?

CW009 Green Laser Corys originate from Peru and are strongly associated with the Pucallpa region and the Ucayali drainage of the Peruvian Amazon.

What do CW009 Green Laser Cory Catfish eat?

Green Laser Corys are omnivorous foragers. Feed a varied diet containing high-quality sinking pellets, tablets, or wafers supplemented with appropriately sized frozen or live foods such as bloodworms, brine shrimp, daphnia, and Tubifex.

Do CW009 Green Laser Corys clean the aquarium?

Green Laser Corys naturally forage along the aquarium floor for food, but they should not be considered aquarium maintenance animals. They require intentional feeding with nutritious sinking foods along with regular water changes and normal substrate cleaning.