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Otocinclus cocama, commonly known as the Zebra Otocinclus, is a small, peaceful, and highly sought-after freshwater catfish belonging to the family Loricariidae. It is prized in the aquarium hobby for its distinctive black and white striped pattern and its efficacy as an algae eater. This species is characterized by its small size, armored body, and ventral suckermouth, typical of otocinclus species. Its unique coloration makes it easily distinguishable from most other Otocinclus species.
Physical Characteristics
- Body shape
- elongated
- Coloration
- Distinctive black and white (or cream) banding pattern. The body is typically light cream to white with prominent, irregular black bands running vertically and horizontally, creating a 'zebra' like appearance. A dark stripe often runs horizontally from the snout through the eye to the caudal fin base. The fins are generally translucent with some dark pigmentation matching the body pattern.
- Scale type
- none
- Mouth position
- inferior
- Distinctive features
- Pronounced black and white striped pattern, Small size, typically reaching 3.5-4.5 cm (1.4-1.8 inches) standard length, Ventral suckermouth for grazing algae and biofilm, Armored body with bony plates
- Dorsal fin
- Single dorsal fin, typically small and triangular, located mid-body.
- Tail fin
- Forked caudal fin, often with a dark blotch or extension of the body stripe.
- Pectoral fin
- Pectoral fins are broad and positioned ventrally, aiding in adhesion to surfaces.
- Distinctive fins
- Adipose fin absent. All fins are generally clear to slightly dusky, with some dark markings that align with the body's striped pattern.
Identification Tips
Coloration
The most defining feature is the striking black and white (or cream) zebra-like banding across its body. This pattern is unique among Otocinclus species.
Size
Typically small, reaching a maximum of 4.5 cm (1.8 inches) in total length.
Body Shape
Slender and elongated body, characteristic of the genus, with a flattened ventral surface and a suckermouth.
Habitat
- Water type
- freshwater
- Depth
- Shallow, typically found in marginal areas of rivers and streams.
- Environment
- Found in clear, oxygen-rich, slow-moving to moderately flowing waters of tributaries, streams, and flooded forests. They prefer areas with dense aquatic vegetation, submerged roots, and leaf litter, where they can graze on periphyton and biofilm. Substrate is typically sand or fine gravel.
- Geographic range
- Endemic to South America, specifically found in the Ucayali River basin in Peru, a major tributary of the Amazon River.
Aquarium Information
- Care level: intermediate
- Temperament: peaceful
- Diet: herbivore
- Minimum tank size: 10 gallons
- Temperature: 21-26°C (70-79°F)
- pH level: 6.0-7.5
- Hardness: 2-15 dGH
- Compatibility: Excellent with other small, peaceful community fish such as tetras, rasboras, dwarf cichlids, and other small catfish. Avoid housing with large or aggressive fish that may view them as prey.
- Special requirements: Requires a well-established aquarium with plenty of live plants (especially broad-leaved ones for grazing), driftwood, and smooth rocks for grazing and hiding. They are sensitive to poor water quality and sudden changes in parameters, necessitating stable, mature tanks. They are schooling fish and should be kept in groups of at least 6-10 individuals to thrive and exhibit natural behaviors. Supplemental feeding with blanched vegetables (zucchini, cucumber, spinach) and algae wafers is crucial, as they may not find enough algae in a typical home aquarium.
Wild Information
- Conservation status: least concern
- Seasonality: Available year-round in the aquarium trade, primarily through wild collection, though captive breeding is becoming more common.
- Market price: Moderate
- Commercial importance: medium
- Taste: Not applicable
- Texture: Not applicable
- Nutritional value: Not applicable
Key Facts
Algae Eating Machinebehavior
Zebra Otocinclus are highly efficient algae eaters, making them a popular choice for maintaining clean aquarium glass and plant leaves.
Social Creaturesbehavior
These fish are schooling animals and thrive when kept in groups of six or more, exhibiting more natural behaviors and reduced stress.
Sensitive to Water Qualityinteresting
Otocinclus cocama are particularly sensitive to nitrates and ammonia, requiring pristine water conditions and a well-cycled aquarium.
Unique Patternamazing
The striking black and white striped pattern of the Zebra Otocinclus is unique within the Otocinclus genus, making it easily identifiable.
Safety Information
Safe- Safety level: safe
- Venomous: No
- Edibility: not recommended
- Handling notes: Generally safe to handle, but like all fish, minimize direct contact to avoid stressing the fish or removing their protective slime coat. Use a soft net if transfer is necessary. They are delicate and can be easily injured by rough handling.
Similar Species
Common Otocinclus
Otocinclus affinis (often misidentified as O. vittatus or O. macrospilus)
Lacks the distinct black and white zebra pattern. Typically has a dark lateral stripe running from the snout to the caudal fin, with a brownish or greenish-grey body coloration.
Dwarf Otocinclus
Otocinclus hoppei
Generally smaller and has a more subdued, mottled brown and tan coloration, lacking the bold stripes of O. cocama.
Panda Corydoras
Corydoras panda
While also having a black and white pattern, Corydoras are armored catfish with barbels and a different body shape (more robust, less elongated) and mouth structure. They are bottom dwellers but do not possess a suckermouth for grazing surfaces like Otocinclus.
Scientific Classification
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Actinopterygii
- Order
- Siluriformes
- Family
- Loricariidae
- Genus
- Otocinclus
- Species
- O. cocama
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