Orange Dwarf Mexican Crayfish

The Orange Dwarf Mexican Crayfish combines a miniature crayfish shape with vivid orange color. Commonly called CPO, it is an engaging animal to observe as it searches the substrate and explores small shelters, offering crayfish behavior on a much smaller scale than most Cherax species.

Animal details

• Scientific name: Cambarellus patzcuarensis — orange form
• Size offered: 2 cm
• Adult size: Approximately 3–4 cm
• Origin: Mexico; the orange form is widely cultivated for aquariums
• Water type: Freshwater
• Temperament: Usually less destructive than large crayfish, with occasional territorial disputes

Recommended aquarium conditions

• Aquarium: 10 US gallons or larger; increase space when keeping more than one
• Temperature: 18–24°C (64–75°F)
• pH: 6.5–8.0
• Water hardness: Avoid extremely soft, poorly mineralized water

Provide plants, small caves, wood, and leaf litter so each animal has several possible retreats. Keep a secure lid and protect openings around equipment. Use a cycled filter and maintain circulation without leaving the entire floor exposed to a strong jet.

Diet and feeding

Offer small portions of sinking invertebrate food, algae wafers, and blanched vegetables. Add a little suitable meaty food for variety. Place food where the crayfish can reach it, and remove leftovers; its scavenging behavior does not replace routine feeding or tank maintenance.

Compatibility and care

Peaceful fish may be possible companions, but dwarf shrimp, snails, and small or resting fish are not guaranteed safe. Avoid large cichlids, puffers, and other crustacean predators. Recently molted crayfish need undisturbed shelter while their new shell hardens. A shed shell may be eaten for its minerals. Keep ammonia and nitrite at zero, acclimate gradually, and check that any aquarium treatment is suitable for invertebrates.

Sizes are approximate. Contact Las Vegas Exotic Fish at (702) 685-5100 to confirm availability or discuss your setup.