Olive Corydoras Care Guide
Corydoras CW019 · Freshwater Fish

What Olive Corydoras look like
The Olive Corydoras (Corydoras CW019) is a small armored catfish characterized by its distinctive olive-green body, which exhibits darker mottled markings that provide effective camouflage against the substrate. This species typically reaches a maximum adult size of approximately 2 inches (5 cm), making it one of the smaller members of the genus Corydoras. Sexual dimorphism is subtle, with males generally being slightly smaller and more slender than females, particularly during the breeding season when females become more robust due to egg development. The body is laterally compressed and covered in bony plates, providing a protective armor against predators. Notable morphological features include the presence of barbels that aid in foraging along the substrate, as well as an adipose fin that contributes to its streamlined shape. The lateral line system is well-developed, allowing for enhanced sensory perception in its aquatic environment.
Behavior & temperament
Olive Corydoras are social fish that thrive in groups, exhibiting a strong tendency to form schools, which provides safety in numbers from potential predators. They are primarily benthic dwellers, often foraging along the substrate for food. Their behavior is generally peaceful and non-aggressive, making them suitable for community tanks. During breeding, they exhibit typical corydoras behavior, which includes egg scattering; females lay eggs on flat surfaces, and males fertilize them shortly after. Their temperament is calm, and they are known to interact positively with other species, although they may become skittish if kept in overly bright environments or with aggressive tankmates.
Diet & feeding
In the wild, Olive Corydoras are omnivorous, feeding on a varied diet that includes detritus, small invertebrates, and plant matter. In captivity, they require a balanced diet that includes high-quality sinking pellets, frozen or live foods such as bloodworms and brine shrimp, as well as occasional vegetable matter to ensure optimal health.
Behind the name
Corydoras (from Greek 'korydallos' meaning 'helmeted') refers to the armored nature of these catfish, while CW019 indicates its status as an undescribed species within the Corydoras genus.
Plan your tank
Check the numbers before you buy: tank volume, a stocking plan, cycle progress, water changes, and your ongoing care routine.
Keeping Olive Corydoras?
AquaLens identifies your fish and plants from a photo, tracks water chemistry, and flags health issues early — free on iOS and Android.



