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InvertebratebeginnerFreshwater

CPO Crayfish

Cambarellus patzcuarensis

AnimaliaArthropodaMalacostracaDecapodaCambaridae

Variety of Mexican Dwarf Crayfish · orange (CPO)

📍 Mexico

Ask Finn

The CPO (Cambarellus patzcuarensis orange) is the selectively bred orange color morph of the Mexican dwarf crayfish, displaying a vivid solid orange coloration that makes it far more visually striking than the wild-type. It retains the same small size (under 2 inches), peaceful temperament, and easy care of the base species, and is one of the most popular dwarf crayfish in the hobby.

Size1.6"
Min Tank10g
peaceful
Zonebottom

Care Guide

Diet

CPO crayfish are omnivorous scavengers that consume algae, plant matter, and small organisms. Feed high-quality sinking pellets or specialized crayfish food 2-3 times weekly, supplemented with blanched vegetables (zucchini, spinach) and occasional frozen foods like bloodworms or brine shrimp. They will also graze on algae and decaying plant material in the tank.

Behavior

CPO crayfish are nocturnal and spend most of the day hiding among plants, rocks, and substrate. They are generally peaceful and solitary, though they may occasionally spar with tankmates over food or territory. They are active foragers and will constantly search the substrate for food, making them entertaining to observe during evening hours.

Breeding

Breeding CPO crayfish in captivity is moderately difficult but achievable with proper conditions. Females produce small clutches of 20-30 eggs and exhibit maternal care, fanning and protecting their brood. Provide plenty of hiding spaces, stable water parameters, and avoid aggressive tankmates; juveniles are vulnerable and may be eaten by fish or larger crayfish.

Common Diseases

Shell Rot (Bacterial Infection)

Symptoms

Soft spots, discoloration, or pitting on the carapace; lethargy and loss of appetite

Treatment

Improve water quality and perform regular water changes; isolate affected individual; treat with antibacterial medication if severe

Parasitic Infection

Symptoms

Excessive molting, visible parasites on body, lethargy, and reduced feeding

Treatment

Quarantine affected crayfish; perform frequent water changes; use copper-free parasite treatments suitable for invertebrates

Molting Complications

Symptoms

Inability to shed exoskeleton, incomplete molts, or death shortly after molting

Treatment

Ensure adequate calcium and minerals in water; maintain stable pH and temperature; provide soft substrate for easier molting

Fungal Infection

Symptoms

White or fuzzy growth on body or appendages; lethargy and reduced activity

Treatment

Improve water quality and increase water changes; use antifungal treatments; remove decaying food and organic matter promptly

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Water it likes

ph
6.5–8.0
ammonia
0 ppm
nitrate
<20 ppm
temperature
61–75°F (16–24°C)

Stats

Community tips0
Kept by0 hobbyists