Description
Dwarf Orange Mexican Crayfish (Cambarellus patzcuarensis sp. Orange – CPO)
📌 Basic Info
Scientific Name: Cambarellus patzcuarensis sp. “Orange”
Common Names: Dwarf Orange Crayfish, CPO
Family: Cambaridae
Origin: Mexico (Lake Pátzcuaro region)
Size: 1.5 – 2 inches (4 – 5 cm)
Lifespan: 2 – 3 years
Tank Zone: Bottom dweller
🌊 Water Parameters
TDS: 150 – 250 ppm
pH: 6.5 – 7.8
Temperature: 20 – 26°C (68 – 79°F)
Hardness: 6 – 12 dGH
🦞 Characteristics
Brilliant bright orange body, stands out vividly in aquariums.
One of the most popular dwarf crayfish due to its small size and peaceful temperament.
Less aggressive than larger crayfish, but still semi-territorial.
Very active, often exploring or foraging instead of hiding.
Can molt and regenerate lost limbs.
🍽️ Food
Type: Omnivorous scavenger.
Diet: Algae wafers, sinking pellets, blanched vegetables (zucchini, spinach, cucumber), frozen/live foods (bloodworms, brine shrimp, shrimp pellets).
Feeding Schedule: Once daily in small amounts; remove uneaten food.
🛠️ Tank Setup & Maintenance
Tank Size: Minimum 10 gallons (for 1–2 crayfish).
Filtration: Gentle but effective; avoid strong currents.
Decor: Hiding places are essential – rocks, caves, driftwood, PVC pipes, plants.
Substrate: Fine gravel or sand; they dig occasionally.
Water Changes: 20–25% weekly.
👥 Social Behavior
Peaceful for a crayfish species; can live in community aquariums.
Can be kept singly or in small groups (ensure hiding spots to reduce territorial disputes).
May sometimes nip at very slow or sleeping fish, but generally safe with fast and peaceful species.
✅ Do’s
Provide multiple shelters to reduce aggression when keeping more than one.
Use a tight-fitting lid (can escape if given a chance).
Maintain stable, clean water with good oxygen levels.
❌ Don’ts
Don’t house with large or aggressive fish (cichlids, bettas, etc.).
Don’t overcrowd – stress and fighting will occur.
Avoid copper-based medications (toxic to crayfish).
⭐ Quick Tips
Compact size and bright orange color make them a fantastic choice for nano and community aquariums.
Much safer for live plants compared to larger crayfish.
Hardy, peaceful, and interesting to watch – ideal for beginners and experienced keepers alike.






